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Hello there. First of all the pro's: awesome model and renders, expecially the composited one. You really can't tell it from a real photograph.
Now the con's: price is too low, sorry. You can at least double it, customers tend to think that underpriced models have something wrong. You could also add some ambient occlusion shots, and above all some wireframe ones. Also, 200k plus polygons really can't be considered as "game ready".
Please take no offense, it is not my goal. My hat down to you for your skills and model quality.
Thanks :)