PlayTrade is a new way to buy products on Play.com. It allows you to buy new, used and collectable products at great prices from third-party sellers, called PlayTraders. PlayTrade will provide you with the widest range of products at the best possible prices. All purchases are completely secure as they utilise Play Payments and are backed by our FairPlay Guarantee.
Seems as though they are going the Amazon Marketplace route and allowing third party sellers to use the PLay.com platform to sell their goods