Color vs GreyScale

   At the Furry Cons I go to, there are a levels of art sketching that I do.  Pencils, inks and grey scale.  I mostly do grey scale because 'everyone' else is doing it.  I put a high price on it to chase everyone away, and they still come. 
   I bought markers, which I guess I like well enough - but often I forget them at home.  I switch to my box of watercolor, which I love.
   So, there I sit - doing art late at night.  The watercolors are out....  what harm is putting color on instead of grey, grey, grey.  I've done it a few times.
   Now my mind spins through the implications.  Color overnight sketches at cons.  I would be able to charge more.  I'm charging $80 for greyscale - so that would be $100 for color.  tempting.
   I charge $100 for take home colored pencil pics.  I can't charge the same for at home work (where there is a lot more detail and un-distrurbed, unrushed work done) then I do for at come homework.  So, this means I will probably up the price of my Take Home work (or lower the at con prices...)
   I also need to figure out what to charge for watercolor Take Home work.  I have a price for colored pencil, and one for acrylic... but I like doing the watercolor now.  I feel confident in offering it.

Thinking.
   I spoke with Donato once and he said I should put my commission prices up fairly high so that I would be available to do the work I wanted to do - instead of directed things.  I see what he was saying.