Timeshares probably are the worst real estate investments around. At most timeshare resorts in Colorado, only the 2 weeks at Christmas can be reliably rented for more than the maintenance fee.
Almost twenty years ago, I got three of them for free because I thought I could trade them through RCI and save money on vacations. This strategy worked just OK, but over the years the maintenance fee went up enough to sour me on my "free" timeshares.
I got lucky a few years ago and got rid of two of them through a close friend who actually sells at new timeshare resorts. He didn't charge me a commission, though he earned it. But even a 10% commission would be zero.
ALL the ads you see when you google "sell my timeshare" are shady, ephemeral companies that will charge you $2k-$5k to take it off your hands. Apparently these outfits often don't actually complete the sale and you are still on the hook.
My sale was a win-win-win:
1. The buyer took over the maintenance fees of $360/year/unit.
2. The buyer donates these unrentable weeks with low trading power to his favorite charity, and gets a yearly tax deduction.
The use of the condo for the week isn't worth zero, because if you call up that resort and want to rent that week, they will quote about $1200. So my buyer gets a $1200 tax deduction, and the charity isn't stuck with the maintenance fee obligation.
Why were my weeks unrentable? There is zero demand for a ski condo in Colorado in May (mud season) or October (cold but no snow). So the only loser is the raffle winner or charity volunteer who receives the week. They have to pay their travel costs.