Andrew, you are a complete jackass for even suggesting such obscene prices. You ARE trying to price gouge, and we will not stand for it. I will take 1070s, but I don't give a RAT'S ASS if they are founders edition or not, a 1070 is a 1070 as far as I am concerned. $300 each is my offer through either PayPal or an escrow here.
I can buy 1080s that will mine more than those 1070s for $700 or less on ebay, newegg, or tiger direct, so you're gonna have to come in a lot cheaper than that with your USED GPUs.