They are now going by the name of Oil Painting Store (*******@allpaint.net). It's SPAM (unwanted commercial e-mail, or UCE). The example of Oilpainting-shop on SteJabber looks very much like yesterday's SPAM from Oil Painting Store.
In the absence of other information, I'm going to assume that the "art" is just posters printed on rough paper so that it looks sorts kinda like real art. I don't expect an original Van Gogh for $89.95, but I would like a bit of honesty in describing what they are selling.
Maybe I wouldn't mind a Monet poster printed on rough paper, but without knowing what the hell they're peddling (in violation of the Ca-Spam Act), I'll just assume it's worthless garbage.
Never more than one start to any SPAMMER.