Your worth is based on what the client wants to pay you. If an object will take 100 hours to complete, how much money do you want to make per hour? $10? $20? $50 per hour? Some artists aren't worth even $10, many others are worth more then $50 per hour. You have to find out where you lie within that range.
I think I just blew a hernia in my brain from all the crappy comment I read so far, but this takes the cake, eviscerates it, splodges all over it before rubbing burning alcohol on it, and then taking it's balls, sewing them to a puppy, and using that to give a duck a feather-paizuiri while dressed up as a Geisha before…