Interesting way of finding something to do with those! I've also been intrigued by the old Proliants on eBay, because the prices seem quite cheap initially: $25

Interesting way of finding something to do with those! I've also been intrigued by the old Proliants on eBay, because the prices seem quite cheap initially: $250-400 for massively multicpu things with tons of RAM. But I've been scared off each time by a mixture of the weight and power usage. One listing even specified that delivery would be made to your loading dock (sadly I do not have a loading dock), although that was for a big Itanium machine.