I'm in need of a shopping cart that features inventory control determined by attributes. For instance, I have 50 different products, which I want to make available to only 1 person in every County in every State in the US. The price for each product is determined by County: ie: Dade Co., Florida would have a price of $30, whereas Seminole Co., Florida would have a price of $25 - no matter what product was actually chosen. Once the item was purchased in Dade Co., an Out of Stock icon would appear to let customers know the item in that Co. was no longer available.
If the cart runs on php and MySQL, so much the better, particularly if I can upload my products directly to the database.
The shopping cart would not necessarily have to be open source (I think I've exhausted that avenue, anyway). Anyone have ANY suggestions for a shopping cart?