I am looking to sell my two XFX 6870s.
The cards come with the original boxes. I have used these for mining PPC for approximately two months. Both are in excellent condition and will hash at 300KH/s scrypt 300MH/s SHA256 - so you are buying 600KH/s-600MH/s worth of mining power.
I am working on funding some more mining power for myself, and selling these is a part of that process.
Send me a PM or post on the thread if you are interested.