A purchasing system facilitates the use of sharing purchase vehicles across multiple buyers. In a database, purchase vehicles are stored, including the sharing purchase vehicles. The database also includes matching rule information associated with the sharing purchase vehicles. In addition, the database includes audit trail information corresponding to the sharing purchase vehicle information. A subset of the stored purchase vehicles is determined based at least in part on the stored matching rule information. The buyer selects a particular sharing purchase vehicle from the determined subset of the stored purchase vehicles, and the buyer transacts a purchase in accordance with the sharing purchase vehicle selected by the buyer. Audit trail information corresponding to the buyer-selected sharing purchase vehicle is associated with the purchase.
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