I just picked these up at a school auction. $168 for 10 (one w/ no acme thr'd shaft). Brands are Wilton, Colombian and Rockler. A couple of them are missing some easy replacement parts. All in all, they're in better shape than in person than the auction pictures.
I've been reading up on rust removal. I'll give Evapo Rust a try first and then go from there.
Instead of spending $$$ on one or two vises, now I'll have a vise on every corner and then some for $$......