looks like it's been honed unevenly with no tape. I'll leave it to an expert as to whether that will make it hard for you to get an edge you like.

Pins clearly replaced so maybe not original scales?

I wouldn't pay more than $10 but I also would get a nicer one instead (so I really wouldn't pay anything for it). There are big W&Bs in solid shape that need a lot of work to get rid of staining and pitting so that's what i'd go for to be sure it was good after I'd done the work.