I'd pretty much echo penguinisto's comments. I think added value is what would compel people to buy this. In addition to the tex issues you might consider adding some alternative textures - for example, the one over my desk has a black plastic frame with some sort of gray and black fleck board. I've got one at work with no frame and a blue fabric cover. You could probably find lots of other examples on the net.

I'd like to see some means of hanging the thing from the wall, also with regard to the modelling the frame could really use lightly bevelled edges to catch the light. They look very sharp at the moment. Maybe also an option to add dents and scratches via a disp map so it looks sort of worn and beat up? It's this kind of detail which would make people buy it IMHO.

Steve