Thanks ppl!
Yes, I've made them. I'm thinking about painting more of them and print the best ones as numbered and signed posters (offset). Offset printing isn't considered "genuine art quality" like a lithography and is therefore a lot more affordable way of reproducing images, and hence much more affordable for both buyer and seller. An offset print can be sold for about $20-$30 while a lithography is more like $100 and more depending on who signed it.
Regards
Emil