Preaching to the choir

Pricing your work is one of the hardest part of being an
artist.

One of the best ways- I have found is to pay yourself for
time and materials. You could figure out how many hours you
have spent on the piece. Some will triple the price of
materials. I would never price something original (painting-
not a print) for less than $100. The more you sell, the
easier to price...

I would err on the side of too much... art is the only true
"free market." It is only worth what someone is willing to
pay for it.

On a more cynical note, the skull image is a work by Damien Hirst proving that a greedy artist is a rich one. He used $20 million dollars in materials and the reported asking price was $100 million.