'bot trial

On my painting table at the mo' is a trial pic of a robot. It's mixed media (collage, acrylics & ink) on a 10 x 10cm canvas board. The prelim sketch is at the side. I'm not convinced that the painting 'works' any better than the sketch. I've been toying with putting some 'bot pics in my 'shops' but I'm not sure whether to go with coloured line drawings on paper (that I'd price up at $2 or so) or full blown paintings (for which I'd have to charge more). I would really appreciate any feedback. 

"Fairy 'botmother"

...because even little robots have dreams and wishes that need to be granted!