Where is the best place or site to sell vintage vinyl records,and get the greatest return?

ebay. anyplace that has an online presence in portland, oregon or seattle, washington.

<—lots of experience in this.

What are you selling (genres, specific bands)? are they in pristine condition? what is your location?

Look out for online scammers who offer a good price for your vinyl records then tell PayPal you never sent them. i.e. check the buyer’s reputation before you send them anything.

I’ve got a stack of old records from the 30’s. I wonder if they’re worth anything?

Gemm is a great place, definitely check them out.