5 BTC @ 1
Why would you pay that much? You do know that these are just the board only and do not include the chips right? There are no parts on it at all and you have to buy and solder all the parts separatly. Without the right tools, it is very hard.
Wait, what that a 5 BTC bid for ONE of the boards? 5 BTC is a lot even for all 10 boards, but go for it.