I agree with Geohammy, we need more info.
Layout, angle, front height are all useful pieces of info for the prospective buyer and are easy to get with the CAD models. About the price, I would not throw something random out there without analysis of factory quotes, taxes, shipping, labor, etc.
About the design: I like the idea, but given that the top piece is 7.5mm tall it might be a bit hard to see the plate through those deep and narrow holes.
About the USB port: it looks like a straight hole, which will either be too small for a cable or expose unnecessary PCB. I think you should add some inner walls that cover most of the stuff while exposing the USB port.
The back engraving looks cool, you should include a higher res/clearer render!
Also correct me if I'm wrong but the plate is missing mounting holes?