Hi Kieth,
Another avenue you might try is to setup a ShapeWays account and get your model setup "3d printable".... They then have a user "store" where you can present stuff for sale.... :)

The TurboSquid type site Michael mentions is a good way also... Tag your model well and people searching for some content they need can buy it....

Daz3d has these options too. Present your content model and people purchase it to fill their scenes....