It'll get outperformed in most all applications by the more dense platter 7500rpm drives, newer 10k rpm velociraptors, and all SSDs.
I have that same raptor drive, and replaced it with the 300GB velociraptor about a year ago. I noticed a huge improvement in almost every area. If you have need for a storage drive, that's probably the best use for it. You could sell it on ebay, but you likely won't get a large amount for it.