Hey! Your very good at drawing online! The right person would probably buy the bottom one for around $50. The top one could sell for about $20. But only because its not as detailed. :3
I think 3 mil is a tad high. It really depends on how long it takes to make each piece. This doesn't look more than an our to me. So 1-2 mil is good enough as a base price. The second one perhaps 2 mil minimum ;D