Nice work, although a bit expensive to my taste.
Maybe ad more renders, close ups and wire frames?
It's a bit hard to judge whether that high price is justified.
It isn't so obvious (to me that is) were it stands out to all the rest.
I see mostly very nice landscape renders, those are very good to get an idea of how the products can look in a environment scenario. However you are not selling a landscape is it?
Maybe ad a nice lineup of the actual models/products and preview of the materials/textures etc.
The landscape renders should act as additional reference.
(just my opinions)