Last post vise I bought was 75dollars, six inch jaws, very old with a brass barrel, but in excellent usable shape. 5 years ago I bought one at a junk shop for $25, six inch jaw, made me grunt, on my bathroom scales it is 120lbs. Have bid several forges of that type up into the low 300s. You can build one similar for about a hundred, put on an electric blower. Bought a large blower, hand crank, out of a barn at auction, for $10, about 3 years ago, never sat out in the rain. Have a hand crank on my portable forge. A good blacksmith makes his own tongs, and when he gets good, his next hammer.