I have a carton of LP's of mostly 50's "easy listening" and a few classical records are they of interest?

Not likely. Record stores see the 50s pop/easy listening regularly and they don't typically sell quickly. The classical may hold some interest if it is a special pressing of a major work, or if you have modern classical music (works written starting around 1900) from the more in demand composers. If you just want them gone, try Goodwill, or if you have garage sales they will sell for 50 cents or a dollar each.

Yes. Also check around there are alot of record store in a 10 mile radius. Check them all