I got the hookup if you are in the US. A guy I know overstocked on 750gb Western Digital Cavier Blue drives for his company. He has them at $30 a piece last I checked (newegg sells them for $60). Shoot me a PM if you or anyone is interested. He might have them cheaper by now if he has them left. He had a few hundred though, so I would think he still has some. Selling by the box too if anyone wants to flip a box and make some money.
Might be a good idea to wait for the Transformer Prime. It should be releasing soon, and it's a massive update on the original. Price will be about the same, possibly a little less. I recall ASUS saying $399 for the 32GB a while back.