Yeah I'd imagine you'd have trouble finding a good deal there. I've had way more luck getting drives from eBay, thrift shops, yard sales and the local dump.

Also by convincing everyone I know to just give me their old stuff that they think is no longer useful. They don't want it taking up space anyway, and I get to harvest the useful bits and add them to my frankensteined home lab, then responsibly dispose of the rest. There have also been several machines I've acquired this way that I've repaired/made whole again, then provided to those who need them.