An internal auction system may generate a quotation for the quantity of a product included in an auction published on the seller's e-commerce site so that the appropriate quantity of the product is identified and/or available on the successful completion of the auction. In conjunction with generating the quotation, a message may be sent to a seller's business information management system, such as for example an inventory control system, reserving an existing and/or anticipated quantity of the product to meet the quantity specified in the auction. This quotation may be rescinded if the auction does not successfully conclude. Otherwise, an order may be created in the business information management system anticipating the winner performing the necessary auction checkout procedures. The order may contain a block in order to prevent it from being further processed until the completion of the auction checkout process by the winning bidder. Upon completion of the auction checkout process, any blocks on the order that may exist are removed and the ordered is released.