It's a Chinese business that looks to be like ebay (without the auctions), in that it lets people and businesses list their own items through the site (and as such, could lead to a lot of KOs being listed).
The prices are all over the place for Transformers, and since these are items being sold by Hasbro China, it will mean international postage from China on top of it.
Probably a good last resort if you can't find something on ebay, Amazon or RK.