Vendio is just a hosting for e-carts. , yet provide no way of tracking the reputation for "seller". and Vendio have zero support if you lose money on this.
Be aware. there are many scams "sellers". look for signs:
cheaper then anywhere.
manual payment methods. (usually they want you to wire the money.)
Ordered a school Text book from one of the sites for less then $20 dollars. I was suspicious after I looked around the site a little and was ready to write it off as a lesson learned about buying cheap text books from unknown retailers. To my surprise it actually showed up in the mail today. The cover is different from the regular text book but this fact was disclosed in the product description. However I tried to link to the store so that a fellow classmate could purchase from here as well but the link seems to have broken.