Buyers ARE protected here. That is a simple fact, and it is because reputation is everything here, and it is not the hyper-inflated meaningless feedback system of eBay. If a buyer here has a problem they can contact the seller and the majority are going to bend over backwards to make it right. On the rare occasion that a seller does not correct whatever the problem is, the mods will step in and sort it out.
No, the mods don't have to give money back and they won't do that, but if a complaint is registered the mods WILL look into it and WILL block the seller if they have been found to have done anything wrong.