Sorry Jeff, you are wrong in lumping all timeshare sales into one catagory. There are many places where it is regulated and provides for exactly what you are refering to. Example from the State of Nevada. NRS 119A.410 Right to cancel contract of sale.
1. The purchaser of a time share may cancel, by written notice, the contract of sale until midnight of the fifth calendar day following the date of execution of the contract. The contract of sale must include a statement of this right.
2. The right of cancellation may not be waived. Any attempt by the developer to obtain a waiver results in a contract which is voidable by the purchaser.
3. The notice of cancellation may be delivered personally to the developer or sent by certified mail or telegram to the business address of the developer.
4. The developer shall, within 15 days after receipt of the notice of cancellation, return all payments made by the purchaser.
(Added to NRS by 1983, 982; A 1985, 1141; 1987, 894; 2003, 984)
Please stay inside and out of the way of lightening for a while, buddy. :p
PS: I just showed the example from Nevada. Most places where timeshares are sold have a right of recision in the contract. This is either required through regulation or offered by those timeshares sales that are reputable. If dealing with one that does not have a right of recision in their contract, I would take my free be and get the hell out of there.