The market is figuring out what these weird things are worth. We know they're worth somewhere between $0 and $1 billion each, right?
I would recommend to express the value in baskets of wheat/rice/potatos, unless you know the future value of the USD. In which case i would appreciate a hint.

Hehehe yes I know the future value of the US dollar, and thus I'd put the exchange rate closer to $1 billion / btc ... Of course, it may also be $1 billion/potato as well =)