Have you tried overclock.net? I have friends that have had good luck getting what they wanted for cards. Being sealed should make it much easier. There, of course, you have to list a price, but list for more than you want so you have wiggle room. My friends did that, and got the higher price unexpectedly.
I SO wish I could get it, but I'd fare better going SLI with my 680 unless I upgraded to a mobo with PCIE 3.0 capability. Sucks, cuz they took my signature 2 model off the marketplace a while back, so I can only get used, which I really don't want to do. I hope this helps a little, as I know value decreases if newer models come out. That, with you wanting strictly PayPal, may be a better route. There are many places, but I have friends that have had positive experiences both ways on Overclock.net (NOT .COM), and it's a really cool & helpful community in my experience.