[avidiax]

I imagine the timeshare company has right of first refusal for transfers, or will be adding that to their contracts as soon as this is a thing.

Now, is it legal? Maybe, maybe not. But they will pretend it is until you take them to court, and they'll quickly settle if you agree not to tell anyone else.

[piperswe]

A right of first refusal just means that they have the opportunity to buy the timeshare before you can sell it to anyone else. That would be a-ok for the customer, since either way the timeshare's off their hands.