Selling is a deed changing hands, so it's not "one time" - the points are based on a deed, not air. If you sell, you are done with that contract.
Bluegreen will allow you to book a reservation for someone else, no charge, and you can charge whatever you want to the person whose name you will put it in. You can also give your points to Bluegreen to rent for you.
Or use your points on a week for deposit to whatever exchange co you prefer.