We are running a shopping proxy company with sales point in China/Taiwan/US-Canada.
We need a professional looking ecommerce site (zencart based perhaps?) with ability to post product we bought for sale as well as submission form for on-demand (usually ebay/webstore links) or custom shopping forms. It is also an ip-location-aware site (ability to submit language pack for the site is a must. You only need to provide English version with code supporting language pack in other languages, we will take care of the translation ourselves) with different language selection.
The on-demand shopping would add a x% (configurable in control panel)
The custom-shopping area should be independent and can be turned on-off in control panel as well. (the link become inaccessible)
The product-shopping area have to be interactive (ability to display most popular, best deal, our seller's ads... etc) and manageable.
Payment method selection will also be needed. We will include wire-transfer (basically a link to our banking info) and paypal as of now.
The UI must be simple and very easy to navigate.