Selling timeshares now, in these economic conditions, is very tough. Look at Ebay and you'll find many timeshares being dumped for $1 just the the owner can avoid annual amin fees. Many charities are no longer accepting timeshares as a gift, as it burdens them with the main fees.
NEVER, EVER, EVER pay any company or person an upfront fee to sell your timeshare for you. Without fail, these are money-hungry scammers.
Here on redweek you can attempt to exchange your week if you'd rather not visit what you own. You could also attempt to rent out your week to recoup some cash.
John C.