I’ve had a series 2 & 3 Hermes and resale value is terrible. There’s a lot of people out there that want the Hermes faces but want to pay no more then $200 so you’ll be dealing with that when you list it. Overall I’d say with a complete Hermes package including box and orange sport band you’d be lucky to get $800- that’s just my experience.
I have an offer of £280 from Mazuma Mobile for my S3 Hermès — that’s just the watch and charger: no strap. Does that sound reasonable? I could bundle it with the Sports Strap (only) and the original packaging and try eBay, but that’s a lot more hassle.