What do people do with their old HD's?

[Phunky Phish]

I have recently upgraded my system and now have 2 spare 80GB Barracuda 7200.7 SATA drives spare!
Dont want to put them in the new one and dont want to waste them by binning them!
Worth 'baying' them or something?

Cheers an Stay Phunky

 

[Phunky Phish]

I did not know I could sell on here, best get posting!!
I did run a raid for a while but really did not see much speed improvement, and when 1 went down and I lost everything I was not best impressed!
Would only use raid now for large 3D CAD models downloaded from a server so backed up!
Spare one in case of failure is a good idea mind.