Are you asking how to put prices on products to sell you art?
Honestly, you first need to address your image quality. The artwork is fine, but you need to either scan it in or photograph it properly if you want to do POD.
i don't know what this is about, but as justin says
stuff like this won't sell on anything at all because its poorly photographed. crooked, bad crop, blurry etc.
you have to know this doesn't look like your original right?
this one isn't even remotely in focus.
scan these in. or they won't sell as anything, not even as an original. as a buyer of something the image has to look professional. but as it stands now, it really needs work. you'll also want descriptions and keywords.