Bro... come on now. I just got a 5870 for 27 BTC shipped.
I just guessed a price based on searches I did in this forum. Perhaps BTC were worth less at the time the other sales happened. That said, this is a premium 5870, not a reference version. It's built with over clocking and voltage adjustment in mind. I don't think you have to flash your bios or void your warranty to up the voltage and overclock these.
I'll adjust the price.
I don't mean to be a jerk or anything
I think a fair starting point for negotiations on that card would be 30 BTC.