THE GOOD NEWS ABOUT THE timeshare resale market is that supply is far greater than demand. There are some real bargains to be found, sometimes for 50 percent or less than you would pay a developer for a new unit in the very same resort. The bad news is that mixed in with those great bargains are countless scams, lousy units, and unsavory businesspeople trying to make a quick buck. Settle in and take notes, because there is plenty to learn before you enter the timeshare resale marketplace.