Work bench vise recomendations

You guys are gonna just HATE me. I went into an estate sale on the trike about 10 minutes before the old ladies wanted to leave for the day. This was a few blocks from home. Down in the basement, no price, was a HUGE vise on a bench. Most of the "good stuff" was gone. I asked someone "what about the vise?"

She said "we'd sell it but we don't know how to remove it"

I told her "I already looked it would take me about 2 minutes"

I beat feet for home, grabbed a few tools and took the pickup back down. TWENTY FIVE BUCKS. The darn thing is so big I can barely lift it. It is HUGE.