Over the years, that has been one of the questions asked most often, and remains one of the hardest to answer. Most timeshare owners approach their first selling experience as if they were selling a residential home. So the expectation is that there will be a large amount of sales data available from a local Realtor. Residential homes are most often sold through Realtors and the sales information is recorded in their local MLS database. A comparable market analysis can then be performed to determine what the "going rate" will be - with a high degree of certainty and a prediction of average days on market. The problem is that timeshare resales have not been sold through a traditional Multiple Listing Service (MLS) so there is no track record of sales prices. In addition, timeshare appraisals are not worth the paper they are written on. They can be produced, but are going to be based on scant information.
Some time ago, the American Resort Development Association (ARDA) provided general guidance that said timeshares sold on the resales market would typically bring anywhere from 50-75% of a retail price. While that is painting with a very broad brush, it is at least some guidance for a timeshare seller. Yet, the first problem encountered with that advise is that it is an average: All resorts, all locations, unrated, Gold Crown, Five Star, both bad locations and good. The "retail price" is also a moving target. On the same day two timeshare buyers at the resort could pay drastically different prices for the same vacation ownership.
It has been my experience that every timeshare seller has a different "threshold of pain" when it comes to losing money when they sell. Some are willing to sell for only the costs involved so they can just walk away from being an owner. Other owners expect, and can make, more money at closing. As always it is a matter of supply and demand. Timeshare condos that are in short supply and high demand will command a better sales price. Timeshare resales prices have even been climbing in certain areas like Hawaii and the Caribbean.
The value of a timeshare is in its usage. If you are not using your timeshare it quickly becomes a liability, not an asset. The best way to deal with that liability is to sell it - without losing your shirt. The absolute worst way to sell your timeshare is through a venue like Ebay. Timeshare vacations sold in that manner go for pennies on the dollar, if they ever close at all. Use a timeshare resales broker to get the best value for your timeshare vacation ownership.
For specific timeshare sales information - average resales prices, price trends, seller tips - check out this report from Stroman Realty, Inc.