http://www.pcandparts.com/price.htm
i have a:
Seagate 200GB 7200RPM 8MB $114.00
(ST3200822A)
as you can see it's still listed. When I bought it from this site (about 8 month ago I think), it was a killer deal at 120$!
It's a good drive, pretty fast and also silent.
If you ask me, better put your extra money on the 8mb cache than on the SATA.