Auction Script

I need an auction script but with a "catch". phpprobid, geoauctions, etc... would be great. But I need the script to be able to be configured to NOT allow others to sell items. In other words, client simply wants the ability to auction/sell her own products and have her customers register and be able to bid/purchase products. I would of loved to simply add the auction contribution to an oscommerce store, but my stores are heavily modified and I'm not sure that the auction contrib is compatible with ccgv and other contribs. I would still love to consider the osc option, but if you have a better idea, let me know. Otherwise, let me know what method you are suggesting and bidding on.