Why do you want out? You must have had a reason to buy in the first place. Is this buyer's remorse or has your situation changed?
You have two choices with one last resort:
1) Learn to use and maximize what you own. You bought this for a reason...
2) Give it away here on TUG or list with a resale broker. You will likely have to give away a free year of use and pay for buyer fees.
If you cannot give it away, and don't want to keep (last resort):
3) Contact the developer to return it.
www.responsibleexit.com Before doing so you need to arm yourself with the following:
In what state is the purchase? Is this a deed or points?
Do you have a mortgage on this timeshare? or do you only owe maintenance fees?
Look at the state law sticky to see if you have any recourse in the state you purchased. If you are in an anti-judicial, anti-deficiency state you are protected and the developer can take back the timeshare to satisfy the foreclosure with a possible ding to your credit.
If not, they can go after your assets for attorney fees and back payments on the mortgage etc.
Do not pay any exit companies up-front