I have a Western Digital Caviar 200GB (186GB Real) HDD I have no need for (Finally made the jump to all SATA); it's had very little use, and is in great shape, according to S.M.A.R.T. diagnostics and how it performs.
Asking price is $40 plus shipping (Probably about $10 via UPS Ground), and I'll throw in an 18" ATA cable with it just in case you need one.
Email me at email@example.com
if interested, and I prefer Paypal transactions. There we can discuss if you want it preformatted in the file system of your choice, or if you want me to "forget" some data on there (This will cost you extra). I'll also set it to Slave if you're a total n00b about hardware. Or Master. Whatever tickles your fancy.