Companies that cold call you are just trying to get you to give them money. They will promise you a large payout for your timeshare and then ask for money for marketing, closing costs, legal fees, taxes or some such. This is a scam. They will not sell your timeshare. They will take your money and that is the last you will hear from them. There have been literally hundreds of groups running this scam over the years. One tactic they frequently use is to claim that they have a buyer or that they market to large corporations. Don't fall for it.