$85 is WAY too low for a 270X. You can get $120 or so for them on eBay at least.
Please up your prices.
Feel free to sell 10+ low-end used video cards on eBay. It'll take you a year, but you might actually get $100+ for each of them. Of course, if anyone you sell to actually finds out it's a mining card, it probably won't go well for you.
How much for 15 Gigabyte 7950s?
Talk to me on IRC for those.
Done.