Price foundations will be based on Resolution and complexity.
1920x1080 - 300points
1680x1050 - 200points
smaller than these 2 - 100points
Comissions are Public, meaning I will do your comission and upload it to my deviant art as I would with any other background unless you ask me to make it a private commission, in which I will send the commission to you via Email.
Request your commissions by sending me a note or a comment on DeviantArt and I'll get back to you, I check my DeviantArt pretty much every day, so you shouldn't be waiting too long for a responce.
I specialize in Sci-Fi style backgrounds such as the examples below, but I will try to meet your requests