Ivge been selling models on turbosquid and other sites for a few years now and would like to pass on some tips that will help you sell a few more.
I notice you only show 1 render of the model, You MUST render the model from all angles and provide a wireframe.
In the model description give the texture dimensions as well as this information is critical to the programmer.
Offer the model in as many formats as possible, I notice that you have on some of your products.
Make sure that your keywords are relevant and if you are making a game model always include low poly as it is the most common keyword.
Make sure that the preview render is as good as you can get it, Some of your previews are very dark. No one will click on a poor preview.
The is an option on TSquid when you upload for gameready make sure you click this and follow the requirements they are not that hard.
Finally this may be the most contreversial, Never sell anything for a dollar, Minimum should be $10 or no one will take it seriously and will consider the model to be flawed.
Hope you get a few sales
<a href="http://www.flatpyramid.com/shopdisplayproducts.asp?authsrch=nickigoe"> <IMG SRC="http://www.flatpyramid.com/MY_WORK.jpg" </a>