I've used <a href="http://www.dvc-resales.com">The Timeshare Store</a> for all of our resale purchases. Pat Spell worked with us on all 3. The Timeshare Store is the sponsor of this forum and has the banner ad at the top of the page.
I agree with the above post concerning the timeshare store. They are very professional and helpful.
However, I would also like to suggest you check the timeshare user group website. They have a classified add section and there are DVC contracts for sale. There website is: www.tug2.net
If you do buy via a third party I would suggest you use a closing service for the transaction. I have used the Timeshare Closing Service and they were very good. There number is: 407-370-2373. Good luck, I am sure you will find something.
I have used Pat Spell...at the Timeshare store....I am in the process of a private sale from the tug board and I know Shontell www.dvcbyresale.com ...All are good choices