Since resorts and ownership types vary greatly, as do laws that regulate the resale of timeshares, it is important to do some research on your brand ownership in order to know which parts of your membership are transferable to the buyer when it comes time to sell.
Marriott does have a few restrictions when it comes to the resale market. If you own a week membership with Marriott, the buyer will not be able to enroll in the Marriott Vacation Destinations Exchange Program. The ability to exchange a week for Marriott Rewards Points will also not transfer to the buyer with a resale. Find more information about Marriott resale restrictions here.