I cannot find a single Wordpress ecommerce plugin that allows you to set a unique base location for each product. All of the plugins I have researched only allow one general location for all products to be shipped from. My online store will feature products hosted by third-party sellers all around the globe (mostly USA, Canada and Europe). When my website processes the order I will simply give them the shipping information and therefore the shipping for each product will need to be calculated based on the location from where it is shipping.
The WP e-Commerce plug-in allows intricate shipping calculation modules but not this vital feature. I think it would be easiest to [build a new shipping module with this plugin]. [Here are the directions on how to use it.] I am open to using other plugins or completely custom solutions to my problem, as well.
Pretty much everything is said in the initial description. Please bid and contact me about how you see this being best done.