Shiny your work is very good, I myself love the style you use.
The only problem is the price, for the ordinary person chances are they don't have enough money for the art yourself.
If that was what every artist did, art would be a lot more expensive. The price is not created from the amount of work you put into it, but the quality.
That's like me going to a teacher and saying "It took me a week to finish the essay I deserve a good grade for the amount of work and time I put into it".
Take a look at Kev's shop:
http://kevdraws.bigcartel.com/gallery
His work has amazing quality and the prices are affordable.
Maybe try to think again of what you want your art prices to look like.
I'm only trying to help