Exhibit (b)(6) BANC ONE CAPITAL MARKETS tel 312 732 4000 ASSET-BACKED FINANCE fax 312 732 3600 Mail Code Il1-1729 1 Bank One Plaza Chicago, IL 60670 BANC ONE CAPITAL MARKETS, INC. This letter is confidential and therefore shall not be disclosed by you to any third party or governmental entity without the prior written consent of Banc One, NA, except as otherwise set forth in the Commitment Letter referred to herein. CONFIDENTIAL September 12, 2003 The Bon-Ton Stores, Inc. 2801 East Market Street York, Pennsylvania 17405 Attn: James H. Baireuther RE: COMMITMENT LETTER DATED AUGUST 29, 2003 Ladies and Gentlemen: Reference is made to the certain Commitment Letter dated August 29, 2003 (acknowledged by you on the same date) from Bank One, NA, with its main office in Chicago, Illinois ("BANK ONE") and Banc One Capital Markets, Inc. ("BOCM"). Capitalized terms used in this letter that are not otherwise defined are defined in the Commitment Letter. You have advised us that in connection with the Tender Offer you intend to increase the consideration from $7.25 per common share of the Target (in cash) to $8.00 per common share of the Target (in cash) and Bank One and BOCM hereby confirm that the Commitment Letter remains effective (subject to the other terms and conditions of the Commitment Letter) notwithstanding the proposed increase in such consideration provided that the portion of such consideration in excess of $7.50 per common share of the Target (in cash) is financed exclusively by the issuance of equity of the Parent. Sincerely, BANK ONE, NA By: /s/ William Hendricks -------------------------------- Name: William Hendricks Title: Director, Capital Markets BANC ONE CAPITAL MARKETS, INC. By: /s/ William Hendricks -------------------------------- Name: William Hendricks Title: Director, Capital Markets