We have the following requirements and I am really hoping Marketpress will work. Please let me know your thoughts.
1) 5000+ products
2) Some products are from a couple affiliate programs we joined, other products we will ship, and some other products will be fulfilled for us.
3) UPS, USPS, FedEx shipping rates? real time rates from their websites?
4) Use a data feed for product input?
5) How are product images handled? I have worked with ecommerce software that stores a link to the image in the database and others that store the image in the database.