There are not many with product feed. DOBA is the only one that comes to mind. They have gobs and gobs of product but not the best pricing though in their defense, they have come down quite a lot.
If you want to try them with no risk, use a low balance gift card to sign up with and you can check out their pricing for I think 14 days. If you decide you like them just switch your card info in the my account tab. If not, just cancel. I suggest this so one doesn't have to worry about a charge which can sometimes happen.