If it's in that condition, with the box and papers, I'd dislocate my shoulder getting my wallet out. Especially if it's a 4" barrel. (Of course I'd play poor, and offer less. What's the worst thing that can happen? They'll say no?)
I had a couple of those High Standard Sentinel's. About the best "bumming around in the woods" 22's I've ever owned in my humble opinion. They're not target pistols, but they're plenty "tin can and pine cone" accurate. They'll fit a holster made for a medium frame revolver. Think Uncle Mike's Sidekick. The guns are really light and carry well all day. The two I had, the D/A triggers weren't anything to write home about, but the S/A wasn't bad at all.
Alas, I don't bum around in the woods much anymore, so I sold mine to younger people who do. They enjoy them.