Do they buy cassette tapes

I think once in while Since they don't sell much

I don't think so.

We do, but there is a limited supply of customers buying them, so we do so with discretion

Most likely not. This is from their website: Sell The Sound Garden in Baltimore (and our Syracuse location too!) buys new and used CDs, DVDs,,Vinyl, Blu-Rays and video games. We offer competitive prices for your items; check out our Selling CDs Guidelines to see what kind of cash you can make on your merchandise.. Please call to make appointment for Vinyl Sales