Nice model as far as I can tell. The problem is...the market is full of that type of model and there are a lot of free models on the internet of cars. Cars are easy to make and are one of the first things modellers do make.
If you intend to make a model to sell then I would advise that you jump on the search on Cults, CGT, TurboSquid, 3D Export, RenderHub etc and search for the type of model you intend to produce and check out the prices and come up with an average. If there are lots of that model already then you can either A. Sell it cheap or B. Don't make another one to add to the glut.
The analytics isn't so bad here for checking the number of models of a certain type that are available which gives you an idea whether or not it is worth it or not.