I've been working on this picture for a good three weeks and am rather sick of it now 8D. I'm fully intent on selling it, as it is, so no crit, please. xD. The anatomy abnormalities are there for a reason- it's a semi-surreal picture and I've got some people interested in it.
Is that actual size? If it is, I hate to say it, but its approximate printed size will be about 2x3" if you're printing at industry standard, 300dpi. And if it's actual size and you plan to print at that resolution (72dpi), it won't be anywhere near good enough quality to charge $12, unfortunately.
Oh, dear god, no. xDD It's MUCH larger than this- it'll fit on a whole piece of paper. xDD I just took into account that not everyone has a computer that deals with large images well xDDD.