That's a New Britain sourced ratchet (at least it's the New Britain Kilness patent design), the Wright sourced ones had the polished contour handle and a larger Wright-type diameter head.
Personally, I wouldn't pay that much for one (the auction price), but I'm also a cheap s.o.b.

IMHO, "worth" is one of two things, either the maximum amount someone's willing to pay for it, or the minimum you'll accept to get rid of it. How you go about determining those values is the real challenge, which typically differ (sometimes wildly) for most everyone.
How's that for stating the obvious?
