We are working on the timetable for rolling out access to AliExpress on the Auctiva site. I don't have a specific ETA for that yet, but it will be soon. I will update this post when we can be more specific.
Regarding pricing, yes Auctiva members will receive valuable special offers and discounts. In addition, many sellers on Alibaba are agreeable to negotiate a price with purchasers who want to buy in quantity.