Modify a PHP framework to do consignment auctions only

Currently have a PHP auction style framework that does not suit our business. See [login to view URL] Need to modify existing PHP (Probid) framework to accommodate our new consignment / auction business. This is not an eBay type auction where customers list their own items. FYI, consignment is when a customer sends items to you to sell online. All the customer will do is print a form and send in items for sale. Our company will take the items and sells them online for the customer in an auction or direct sale (buy it now) format. We will do the following for the customer: Verify customer’s items were received via email List customer’s items in an auction or direct sale Enter items Take pictures of the items and apply them to the sale Create the descriptions Handle inquiries by customers Relist items when they do not sell Send winners their items Apply fees to winners and consigners where needed Handle returns / refunds when needed Send the consigners their proceeds less fees. Have a system for tracking Items customers sent in for consignment / status Items shipped with tracking numbers Amounts owed by each customer and a method for billing them Late payments Customer invoices Customer needs to be able to track the items that they have consigned to us but has no control over these sales. Also Need: An easy method of entering / activating new auctions An easy method to bill consigners their seller’s fees and other costs A way to track late accounts A way to manage items returned and associated fees. A way to apply fees when necessary A printable online consignment form created for the customers to print, fill out, sign, and send with their items Would like a PHP expert, must know MYSQL, possibly wordpress, needs to understand how to modify existing PHP frameworks.