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