I think we should back off now, he does seem like a bad business owner, and he handled the situation poorly and unprofessionally, esspesaly with the Democrat line, and does deserve some slight bugging, but the BBB or eBay complaints is probably too far, and there might be some penalty at you for starting the offer spamming.
but it's not like he is trying to mark it up more than it is worth. If the game was "Super Mario Bros./ Duck Hunt", I'd support the badgering more, I wonder if the employee who put it out there got in any trouble after this.
You probably have something with the mispriced merch, you are supposed to sell it for the advertised price, It was in the $10 bin, I was in a FYE once and there was some $30 headphones, there was a sign saying $20 and comes with a free pair of in earbuds. When I tried to buy it they said the sign was old (There was no Offer good till whenever on it BTW) but after some discussion I got the sale.
I think it is best to let it pass.