Also Amazon is offering is offering a Seagate Barracuda for $100 (since raised back to $130). If you are a rebate kind of person you can get a 1Tb drive at NewEgg for $99 after $30 rebate.
1TB drives have been coming down in price more significantly since larger 1.5 TB drives have hit the market.
What makes SATA drives more interesting/fun is that you can use them like hot swapable disk drives if you get a USB docking station (like pictured). They have standardized power/interface port locations acoss all drives and manufacturers.
The first hard drive I ever bought was a 80 MB SCSI Hard drive which was just under $1000. Today, if someone gave me a 80 MB USB Key, I’d probably toss it.