Keep an eye on craigslist.
I stumbled upon a 6" Craftsman forged vise while looking for some stuff. Guy was a mechanic, who knew the cost of things, and wouldn't haggle. But $160 wasn't bad considering how expensive vises are. And he was in another state - cost $60 shipping.

But, when I got it here and installed on the workbench, I knew I had a winner.