How can I get rid of my timeshare?

This timeshare is completely paid off, the dues are paid for this year, and I have a three-year membership to Interval International but...

The bottom line is that I do not want it and do not want to use it. I felt totally duped into buying this and now I want nothing to do with it. I simply want to get rid of it by any means although it would be nice to gain a few dollars in the process.