There's one on Craigslist in Springfield, MO for $14.9. I don't know what shape it's in.
When I put the info into NADA, using just the A/C and the awning as options (there may be more, such as hanging cabinets, TV antenna, etc. that you are not aware of) it shows low retail at $11,055 and high retail at $13,320. I don't really trust the NADA guides for TM's.
On the other hand, there are these at Custom RV in Anaheim, CA:
http://customrvsales.com/customrvinc-kzrv_006.htm
And there aren't that may SD models around.