Bah, I purchased a 500Gb Seagate SATA in January and paid more than twice that.
I'm still not sure about these large capacity drives in a non redundant situation.......
3 Seagate 300Gb SATA drives out of a total of 6 have failed:
http://www.gofuckyourself.com/showthread.php?t=715949
Are 750Gb drives safe for your data?
http://www.gofuckyourself.com/showthread.php?t=690625