Interesting situation and some of the responses.
1. Sometimes things don’t work out the way I would like them. Deals with it. That’s life.
2. The OP’s 2019 experience seems a reasonable concern if the unit had a discernible odor. Cigarette smoke smell is not near mint condition cosmetically. Yes, that refers to its appearance, but a strong odor is in the realm of cosmetics.
3. After the 2019 experience, OP you were forwarned and forearmed for future purchases. This one is on you.
4. Websites generally are useless. Try getting eBay to do anything. The best defense is paying via PayPal for goods and services. PayPal almost always side with the buyer.
5. If the site in question is USAM, they offer a free service. What do you expect. They don’t gouge profits from sellers like AG, eBay and others.
6. Be a responsible buyer and seller, take care of your needs, and the rest takes of itself. Occasionally I have to deal with a bad individual. Stay calm, patient, and realize it’s just a piece of equipment.
Goodluck in your future purchases.