Which resorts does he own? 95% of timeshares have zero value, 5% do but a lot depends on resort, and season.
Marriott and Westin are the better brands so they could be worth something.
I own a few, and am happy to help.
EDIT:
Redweek is pretty good advice if you want to sell, there’s also TUG…if they are giveaways (dependent on above), you should be able to find someone on the TUG forum that will take it for free.
Let me know what you’ve got and I’m happy to get the ball rolling.
Never, ever pay an exit company.