The maintenance fees at this resort are $6.35 per thousand points without the program fee. There's a listing on eBay for 587,000 points at Smoky Mountains. The maintenance fees are at that resort are $5.78 without the program fee. The seller has a buy it now price of $1500 which includes the closing cost and transfer fees but is willing to take offers. I'd start with offering $800-$1000 but wouldn't go any higher than maybe $1200-$1300 if they make a counter offer. The seller doesn't have a huge amount of feedback but they do have enough that I wouldn't be nervous about dealing with them. Also they accept payment by PayPal. I'd use a credit card linked to my PayPal account as that will give you the most protection.
I noticed that the seller offers a BOGO. There can be some hidden gems in those BOGO lists if you know what to look for. It can be a great way to get something at a low maintenance fee resort that gives you an RCI points account. We've found our RCI points account to be a fantastic supplement to what we have with Wyndham.