There are no magic words they can use to end your timeshare ownership. They do one of two things. For money they charge you- They advertise it. And after they get no 'takers', they hit the owners for more money- Oh, did they tell you that you have to keep it 'current'? Then after no takers, they charge you more, and have you sign a 'quit claim' deed to some LLC. After the TS outfit gets onto them, and they have sufficient TSs in the LLC, they bankrupt it, leaving all the rest of the owners a big legal bill to foreclose and market those intervals and maintain the facility.
Better: Join TUG for $15- write up a nice ad and post it in the Marketplace up in the dark blue stripe on this and every page in TUG. Keep it reasonable. Offer to pay transfer costs (TUGgers do it for a couple hundred $). Someone will give it a good home.
Jim