Call Creative Arts Workshop. They have a full darkroom and (at least used to) offer regular beginner to advanced darkroom classes as well as renting out darkroom access at a very reasonable rate.

When you say you tried Facebook, did that include joining/posting an #ask in your local Buy Nothing group? That’s what I’d try.

Had a similar experience myself earlier this year, FYI. Wish I had had read something like your comment before I dropped off all my boxes and known to try another route if I wanted to recoup any of the value of what I offloaded, so good on you for posting this here.