I have several 6990s I am about to sell. Before I put them up on EBay, I wanted to check with my fellow forum members. I have 4 of them, and they all work great. I was mining with all of them before the price drop, and they were never overclocked.
Edit: I'm also covering priority shipping with them, so no extra costs
Edit, Edit: I also have a bunch of 5830s I'll sell for 40 BTC ea.
Edit, Edit, Edit: I just noticed, I did in fact have the wrong price for the 5830s. the 4 and 5 are way to close to each other