**SORRY, ONLY CONSIDERING LOCAL IN-PERSON TRANSACTION ON BAY AREA, CALIFORNIA**
I have an open mining rig for sale with:
1 Saphire R9 280x Toxic edition.
1 Saphire R9 280x.
2 Gigabyte R9 270x
1350 Watt high efficiency power supply
USB Wireless adapter.
8Gig ram.
2 core power efficient AMD.
All 4 cards are raised for efficient cooling. Currently running without any care whatsoever in my garage. It runs Linux without any overclocking, and I get an easy 2200KHz on Scrypt. Would certainly yield more with overclocking, undevolt and extra fan.
I also have a loose PowerColor Radeon HD 7950 for $250.
http://www.newegg.com/Product/Product.aspx?Item=N82E16814131458&nm_mc=TEMC-RMA-Approvel&cm_mmc=TEMC-RMA-Approvel-_-Content-_-text-_-I have another riser cable and an empty PCI slot if you want to combine this with the rig. $1750 for all. That's for about 2900 - 3000 KHZ!!
PM me.