I have an older Redfield 3-9 scope that I could use a little help determining the value of. It has 3x-9x Redfield marked on the side. I think it's a WideField, but doesn't indicate it in writing. The reticle is duplex, has some marks on the outside, but the lenses are clean. I also have some old, slightly rusted Weaver rings that it was in. I've seen "vintage" scopes for sale, but can't really determine if they're worth the prices people have asked.
Any idea what it's worth?