I have 2 x Reference HD 5850's that no longer mine. They do post and work in 2D mode but lock up when I start a miner with them, even at stock speeds. I'm not sure where they were each individually purchased, but were certainly bought used from eBay or locally. They have 5870 BIOS's on them so I could run them at 975/325. They were re-greased with Arctic Silver 5 as needed and kept as close to 70C as possible while mining. Their fans are in good condition.
I am hoping to get 15 btc/ea, but will take a reasonable offer considering the condition. Willing to ship anywhere buyer pays.
Edit: I have one reference from selling another dead card here https://bitcointalk.org/index.php?topic=484.msg478103#msg478103
Edit: Per suggestion of a user PM I tested both cards 3D with fgl_glxgears and gltron and both cards tested smoothly for a few minutes each at stock speed.