Found one at a local thrift store with the power supply and assembly manual for $10. Took me a while to figure out how to open it.
EDIT: Would be nice to get a Mac Mini to go along with it. Hint, Hint.
Not as nice as $10, but new ones were $42 at OWC last time I checked. $49 with the software bundle. Nice if you have some old PATA drives that need homes. If one does not already have spare PATA drives of a capacity worth using, then it's kind of pointless to get a v2 any more. Sigh.
I have 750GB Seagate drives installed in my two MiniStack v2s and a G4 Mini. When I get a round tuit, the stack of three devices will become my home's iTunes server. I'm currently using a Beige G3 tower, which takes up a lot more space.