Just found a Quantum Fireball 6.4

Was just cleaning out my garage, looking for some computer parts, and a stumbled on an older computer, pulled out the hard drive and it was a Quantum Fireball 6.4, 3.5 Series. So I decided to look it up, and I found two ebay sells, and when checking them out, each were selling in the for 100+ dollars. Surprising considering the size being only 6.4 gbs. Either way my question is, for what reason do you think these hard drives were up for sell? They surely can't be expecting to sell them for that price.