Do you want to sell just the use of the points or the underlying timeshare? What kind or 'points'? There are dozens of different 'point' clubs or types of ownership, few of which are translatable to another.
If you want more than about $100, you would have to join TUG ($15/yr) to put a classified ad in the Marketplace (red stripe above here) or to give it away or sell cheap, list it in the Bargain Deals at the top of this forum. Just follow the basic format you see there with other ads.
Keep your expectations low. Timeshares are not worth much, if anything. Just look at the numbers of them on eBay for a dollar, and no bids.
Best Wishes, and Welcome to TUG
Jim