Probably not the best place to ask but maybe can be provided with useful info.
I own two timeshares from a company called Vistana in Florida. I not been using them in at least 14 years. Not only that, I could have rented out my weeks. I never went, and I could have exchanged it for points if I never went on my allocated weeks. Not to mention I could exchange it for top hotels and if member of say RCI and others exchange it for other places around the world.
I obviously paid a lot for these which are different sizes back in the day and I just need to know best way to sell them.
Probably best to contact someone in the Floridian real estate business.