I'm super tired but if I read what you said the right way, you just make a thread in the forum called Art Shops. You can either make it in the main section where you see art shops or in the subforum Pixel/Other Art.

And um D: like I said before I'm tired but if I sort of understand what kind of shop this is and your ideas to do with it.. yes it sounds like a good idea.. you never know unless you rtry