Vises are one of my vices.
I have a few- none of them great but adequate for most of what I do. Always keeping my eye out for another one. If you live in an area that had foundries or oil field work they seem to be more plentiful. Most of them around here are farmer grade junk or worn and beaten to death.
Still waiting for the deal of a lifetime. But, like Ken in Ontario, I probably wouldn't feel right about paying so little and would have to let them know the true value. Then I wouldn't be able to afford it.