Advanced Micro Devices hasn't released its newest dual-GPU graphics card, but it sent out some engineering samples a while ago, to its partners.
These samples were never meant to come within reach of the general public, but alas, one has done so.
There is an auction on eBay, right now, for a Radeon HD 7990 adapter, which had an opening bid of $0.99 / 0.75 Euro.
Yes, the bid really was so low to start with. Then again, after 36 different bids, the offer now has to be of $1,125 or more (853.57-1,125 Euro).
Go here to make a bid of your own, through PayPal.
The engineering model has a clock speed of 950 MHz for the GPUs (2,048 Stream Processors per chip), and 6 GHz for the 3 GB of GDDR5 VRAM (again, per GPU, 384-bit interface).