Exhibit 10.1

LIMITED GUARANTEE

OF

GS CAPITAL PARTNERS VI, L.P.

LIMITED GUARANTEE, dated as of December 22, 2006 (this “ Limited Guarantee ”), by GS Capital Partners VI, L.P. (together with GS Capital Partners VI Parallel, L.P., GS Capital Partners VI Offshore, L.P. and GS Capital Partners VI GmbH & Co. KG) (“ Guarantor ”), in favor of ADESA, INC., a Delaware corporation (the “ Company ”).  On the date hereof, the Company has entered into guarantees (the “ Other Guarantees ”) with (i) ValueAct Capital Master Fund, L.P., (ii) Parthenon Investors II, L.P. and Insurance Auto Auctions, Inc. and (iii) Kelso Investment Associates, VII, L.P. and Insurance Auto Auctions, Inc. (collectively, the “ Other Guarantors ”) on substantially similar terms, except as otherwise expressly provided therein.  Any capitalized term not otherwise defined herein shall be as defined in the Merger Agreement (as defined below).

1.             LIMITED GUARANTEE .  To induce the Company to enter into that certain Agreement and Plan of Merger, dated as of the date hereof (as amended, supplemented or otherwise modified from time to time, the “ Merger Agreement ”), by and among the Company, KAR Holdings II, LLC, a limited liability company (“ Buyer ”), KAR Holdings, Inc, a Delaware corporation and wholly-owned subsidiary of Buyer (“ Holdings ”) and KAR Acquisition, Inc, a Delaware corporation and wholly-owned subsidiary of Holdings (“ Merger Sub ” and together with Buyer and Holdings, the “ Buyer Parties ”), the Guarantor absolutely, unconditionally and irrevocably guarantees to the Company, on the terms and conditions set forth herein, the prompt and complete payment, if and when due of 34.3373% (the “ Guaranteed Percentage ”) of the obligations of the Buyer Parties pursuant to and in accordance with: (i) Section 8.3(d)(i) of the Merger Agreement with respect to the Buyer Termination Fee; (ii) Section 8.3(d)(ii) of the Merger Agreement with respect to the reimbursement of the Company Transaction Expenses; and (iii) Section 8.3(d)(iii) of the Merger Agreement with respect to the reimbursement of the Company Financing Fees and Expenses and the Credit Facility Fees and Expenses (the Guaranteed Percentage of the payment obligations identified in clauses (i) through (iii) above, are collectively referred to herein as the “ Obligations ”); provided , that, notwithstanding anything herein to the contrary, in the event that Guarantor has actually paid the Guaranteed Percentage of the Buyer Termination Fee pursuant to clause (i) above or the Guaranteed Percentage of the Company Transaction Expenses pursuant to clause (ii) above, Guarantor shall have no payment obligation with respect to the Company Financing Fees and Expenses or the Credit Facility Fees and Expenses referenced in clause (iii) above; and provided , further that the maximum aggregate amount payable by the Guarantor under this Limited Guarantee (exclusive of any amounts required to be paid by Guarantor pursuant to and in accordance with Section 16 hereof (the “ Prevailing Party Costs ”)) shall not exceed the aggregate of Thirteen Million Seven Hundred Thirty Four Thousand and Nine Hundred Forty U.S. Dollars (U.S.$13,734,940) (the “ Cap ”); it being understood that this Limited Guarantee may not be enforced without giving effect to the Cap.  Except for Prevailing Party Costs, the Company hereby agrees that in no event shall the Guarantor be required to pay to any Person under, in respect of, or in connection with this Limited Guarantee or the Merger Agreement, more than the Cap, and that Guarantor shall not have any obligation or liability to any Person relating to, arising out of or in connection with, this Limited Guarantee other than as expressly set forth herein.  Should either of the Buyer Parties default in the prompt and complete payment or performance of the Obligations, the Guarantor’s

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obligations hereunder shall become immediately due and payable to the Company.  The Company shall provide Buyer and Guarantor with reasonable documentation, as applicable, of the Company Financing Fees and Expenses and the Company Transaction Expenses and shall use reasonable best efforts to provide Buyer with reasonable documentation of the Credit Facility Fees and Expenses.  All sums payable by the Guarantor hereunder shall be made in immediately available funds.  The Company may, in its sole discretion, bring and prosecute a separate action or actions against the Guarantor for the full payment of the Obligations, subject to the Cap (plus any Prevailing Party Costs), regardless of whether the action is brought against one or both of the Buyer Parties or any Other Guarantor or whether one or both of the Buyer Parties or any Other Guarantor is joined in any such action or actions.  Notwithstanding anything to the contrary contained in this Limited Guarantee or any other document, the obligations of the Guarantor under this Limited Guarantee and of any Other Guarantor under any Other Guarantee shall be several and not joint.

2.             NATURE OF LIMITED GUARANTEE .

(a)           The Company shall not be obligated to file any claim relating to the Obligations in the event that one or both of the Buyer Parties becomes subject to a bankruptcy, reorganization or similar proceeding, and the failure of the Company to so file shall not affect the Guarantor’s obligations hereunder.  In the event that any payment to the Company in respect of the Obligations is rescinded or must otherwise be returned for any reason whatsoever, the Guarantor shall remain liable hereunder with respect to the Obligations (plus any Prevailing Party Costs) as if such payment had not been made (subject to the terms hereof).  This is an unconditional guarantee of payment and not of collectibility.  Notwithstanding any other provision of this Limited Guarantee, the Company hereby agrees that (i) the Guarantor may assert, as a defense to any payment or performance by the Guarantor under this Limited Guarantee, any defense to such payment or performance that the Buyer Parties could assert against the Company under the terms of the Merger Agreement, other than any such defense arising out of, due to, or as a result of, the insolvency or bankruptcy of any Buyer Party or any of the Other Guarantors, or any defense based upon a claim of fraudulent conveyance and similar laws of general applicability relating to creditors rights; and (ii) to the extent the Buyer Parties are relieved by the parties to the Merger Agreement (including the Company) of their obligations under Section 8.3(d) of the Merger Agreement, the Guarantor shall be similarly relieved of its Obligations under this Limited Guarantee.

(b)           The Company hereby acknowledges and agrees that, as of the date hereof, each of the Buyer Parties’ sole assets are a de minimis amount of cash and their respective rights under the Merger Agreement, and that no additional funds or assets are expected to be contributed to the Buyer Parties, except as contemplated by the Merger Agreement in connection with the Closing.

(c)           Notwithstanding anything that may be expressed or implied in this Limited Guarantee or any document or instrument delivered contemporaneously herewith, and notwithstanding the fact that the Guarantor may be a partnership or limited liability company, by its acceptance of the benefits of this Limited Guarantee, the Company covenants and agrees that (i) neither the Company nor any of its Subsidiaries or Affiliates, and the Company agrees to the maximum extent permitted by Law, none of its officers, directors, security holders or

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representatives, has or shall have any right of recovery under the Merger Agreement or the transactions contemplated thereby, and to the extent that it has or obtains any such right, it, to the maximum extent permitted by Law, hereby waives (on its own behalf and on behalf of each of the aforementioned persons) each and every such right against, and hereby releases, and no personal liability shall attach to, the Guarantor or any of the Sponsor Affiliates (as defined below), from and with respect to any claim, known or unknown, now existing or hereafter arising, relating to the Merger Agreement or the transactions contemplated thereby, whether by or through attempted piercing of the corporate (or limited liability company or limited partnership) veil, or by or through a claim by or on behalf of the Buyer Parties (or any other Person) against any Sponsor Affiliate (including, without limitation, a claim to enforce the Equity Commitment Letters) (the “ Released Claims ”), except for its rights to recover from the Guarantor (but not any Sponsor Affiliate, under and to the extent provided in this Limited Guarantee (subject to the limitations described herein)), and its rights against the Other Guarantors pursuant to the terms of the Other Guarantees; and (ii) recourse against the Guarantor under this Limited Guarantee (subject to the limitations described herein) and against the Other Guarantors pursuant to the Other Guarantees shall be the sole and exclusive remedy of the Company and all of its Subsidiaries and Affiliates against the Guarantor and each Sponsor Affiliate in respect of any liabilities or obligations arising under the Merger Agreement or the transactions contemplated thereby. For purposes of this Limited Guarantee, “ Sponsor Affiliate ” means, collectively, any former, current or future director, officer, employee, agent, general or limited partner, manager, member, stockholder, Affiliate or assignee of the undersigned or any Sponsor Affiliate or any former, current or future director, officer, employee, agent, general or limited partner, manager, member, stockholder, Affiliate or assignee of any of the foregoing; provided, that, if the Person is an Other Guarantor, such Person shall also have such obligations to Company as are set forth in the Other Guarantee of such Person.

(d)           The Company hereby covenants and agrees that it shall not institute, directly or indirectly, and shall cause its Subsidiaries and controlled Affiliates not to institute, in the name of or on behalf of the Company or any other Person, any proceeding or bring any other claim arising under the Merger Agreement or the transactions contemplated thereby, against the Guarantor or the Sponsor Affiliates except for claims against the Guarantor under this Limited Guarantee (subject to the limitations described herein), any claims against any Sponsor Affiliate that is an Other Guarantor under an Other Guarantee, any claims for equitable relief permitted under Section 9.12 of the Merger Agreement, or any claims permitted under the Confidentiality Agreement.

(e)           The Company acknowledges that the Guarantor is agreeing to enter into this Limited Guarantee in reliance on the provisions set forth in Sections 2(b) through (e). Sections 2(b), 2(c), 2(d) and 2(e) shall survive termination of this Limited Guarantee.

3.             CHANGES IN OBLIGATIONS; CERTAIN WAIVERS .  The Guarantor agrees that the Company may at any time and from time to time, without notice to or further consent of the Guarantor, extend the time of payment of any of the Obligations, and also may make any agreement with one or both of the Buyer Parties or any Other Guarantor for the extension, renewal, payment, compromise, discharge or release thereof, in whole or in part, or for any modification of the terms thereof or of any agreement between the Company, on the one hand, and one or both of the Buyer Parties or any Other Guarantor, on the other hand, without in any

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way impairing or affecting the Guarantor’s obligations under this Limited Guarantee.  The Guarantor agrees that the obligations of the Guarantor hereunder shall not be released or discharged, in whole or in part, or otherwise affected by: (a) the failure of the Company to assert any claim or demand or to enforce any right or remedy against one or both of the Buyer Parties or any Other Guarantor; (b) any change in the time, place or manner of payment of any of the Obligations or any rescission, waiver, compromise, consolidation or other amendment or modification of any of the terms or provisions of the Merger Agreement, any Other Guarantee, or any other agreement evidencing, securing or otherwise executed in connection with any of the Obligations (provided that any such change, rescission, waiver, compromise, consolidation or other amendment or modification shall be subject to the prior written consent of the Buyer Parties to the extent expressly required by the Merger Agreement or to the prior written consent of any of the applicable Other Guarantors, to the extent expressly required