I am selling a reference XFX 5830. I will be honest, I have been running it OC'd for about 4 months. It is extremely stable at 1030 MHz, 338MH/s. It has never been above 75C and the fan has been running at approximately 60%.
It is one of my best cards, but is an odd duck in a rig with 5850s. It comes with the original box and accessories as well as a lifetime warranty from XFX. I am away from my rig for the weekend (it will ship Tuesday, Monday is a holiday), so this is the best picture I can provide. It is the card on the left. I assure you, it is in great shape.
This is an excellent deal, with a proven 3.3 MH/$.
My Web of trust rating: http://trust.bitcoin-otc.com/viewratingdetail.php?nick=DBordello&sign=ANY&type=RECV
Let me know if you have any questions.