It sounds like you want the guitar and are planning to keep the guitar. I guess I'd be prepared to not reach any satisfactory resolution as you may point it out to the seller and they might say "fine, send it back". Then you're out the guitar you really want, which isn't an option you want to consider. I don't think Reverb would do anything for you either as that would be considered an appropriate course of action by the seller. Then your only option is to leave bad feedback. Not sure how Reverb works, but if the seller protests and provides proof they offered to take it back and give you a full refund, your feedback may get removed. Sucks for sure.