Get a Maxtor 300GB UDMA/133 5400RPM 2MB IDE HDD, no rebates are required. It may not be the ‘best’ HDD in the world but for under $100 it’s worth checking out! (As of the time this was submitted there were 124 left).
Looks pretty sweet… but I am guessing they will go fast. Downside… Not SATA and only 5400rpm. However if you are just looking to cram more space into your old machine, this will do the trick.
Maxtor L01S300 300 GB 7200RPM SATA Internal Hard Drive – Price: $183.95