Today I received the Gigabyte R9 290
X OC I bought from Amazon Warehouse Deals for $330. The retail box showed up in very good condition, almost like new.
Opened up the box and nothing seems to be missing.
I installed the 290X after removing my Nvidia driver/software and running CClean. It posted with video, and booted into Windows 8.1 on the first try. Installation of the Catalyst Control Center went smoothly, with no video/audio issues after restart.
So far, I've ran through about 20 games on my Steam Library ranging from small indie to demanding AAA. I ran into a small issue with Tomb Raider while switching graphic settings to Ultra. The game black screened and rebooted my desktop. I went back into the game afterwards and played for 10 minutes, and everything was fine.
A used non-ref R9 290X for $330 is an amazing price, even as used. With Amazon's awesome return policy I have one month to put this card through torture to make sure it's stable. I also think the Gigabyte 3 year warranty goes by serial/manufacture date, but I need to call them for confirmation.
Amazon still has these through Warehouse Deals for $$330.97 and I fully recommend it... for now.