I used OfferUp to sell something.
I never got paid because my account was still setup to have the money deposited into an account I haven't had for years. I called my bank, and they said that the deposit didn't show up on their end and would have been rejected, since the account didn't exist.
I let OfferUp know, and they said that they can't help at all.
I've never dealt with a more non-empathetic support, staff. It's like they don't even care to help customers.