Of all things, while looking for something entirely different, I find this in my own area:
http://washingtondc.craigslist.org/nva/sys/3742890054.htmlI've never seen any NeXT stuff on craigslist before...
I'd say go for it. If it's in your area, and no shipping needed, then that is a good price (it's probably a good price even with shipping).
Plus, you get two motherboards, one probably as a spare or modded to be a headless system.
Eh, wasn't planning to buy an 030 cube. Mostly posted in a moment of surprise and if anyone is interested. Can't imagine it's gonna find a buyer easily...