If the buyers want to spend more than retail, that's their choice. Everyone sold the Wii, Playstation 3, Xbox 360, iPhone, and other things, for more than retail, at launch. It's a common thing to do. If the buyers want to be stupid, and pay more than retail, it's not the fault of the sellers.
Though it is there fault that other people who wanted to buy it at the standard price can't. Since they bought extras to sell for more then they were worth.