I believe the WOT rating is about the host of that the shop is using to host their shop on.. In other words, Qtan (Same guy who owns that Ebay shop you linked to, also a forum member here,) runs a shop on a website that hosts shop websites.
Taken from WOT "vendio.com
Description:
Vendio offers a complete ecommerce software solution that includes an online store and simplifies selling on sites like eBay, Amazon and more. "
Here's Qtan's subforum if you're still worried about how legit he is:
http://geekhack.org/index.php?board=81.0