I'd be a touch amazed if you can get anything like $8 for it. I see them at estate sales for anywhere from $1 to $5.
There was a time when beam-type torque wrenches were what you had unless you were a professional mechanic. They're not expensive, and they're not hard to adjust to zero ("calibrate"). But other designs work better when you're torquing a fastener that's upside down in a constricted space or in other awkward situations, and, as the prices came down on those, people, including me, migrated to the better designs. I think I still have one or two beam-type wrenches, including the first torque wrench I ever bought, back when we first started torquing the fasteners on the wooden cart wheels; but only for nostalgia.
