The secondary market is flooded. Most timeshares have a resale value of near zero because the ongoing maintenance fees are so high that new buyers don't want the liability. Furthermore, many "resale" companies are scams that take upfront fees and never find a buyer. Giving it away is also difficult because many resorts must "approve" a transfer, and they often block them to keep the original owner responsible for the fees. Professional cancellation is usually the only way to ensure the deed is legally and permanently removed from your name.