I have three weeks of timeshare that i wanna get rid of. Which website is the most effective, not too expensive and easy to understand?

I have a Timeshare membership with Vacation Brokers Int. Inc. (a Toronto based company) and wish to dispose of this, as we have never used it, and probably will not in the future. Basically it was a good idea at the time, but our circumstances changed within a few weeks of buying this. Since we decided to sell it, practically anyone interested in selling it for us wants money up front to advertise it on the web.