Looking for a WP theme or plugin related to B2B

Now I want to build up a business website,it’s mainly B2B, namely, it’s wholesale, not B2C, while, it can order online, just like the wholesale product on alibaba:http://wholesaler.alibaba.com/product-detail/Prolash-eyelash-serum-private-label-eyelash_60309913358.html

It can have different price per different quantity.

Thanks for the recommendation