Very interesting thread, not that I am thinking of selling, I am a beginner, but I would be interested in what my own quilts would be worth, money wise. I agree workmanship must come into it and also perhaps original designs over the more commonly seen designs. Some quilts are master pieces both design and workmanship. Hand quilting would obviously take longer so should by rights be dearer but I have also seen some pretty hairy hand quilting! Custom made would be dearer for sure.
Myself, I would hate to work to order, I do not think I could keep focused on a project I had not created myself or had my personal imput. I respect other quilters may feel differently about that.
I paint and sell my work but never take on commissions because I always lose interest the moment they say,'What I want is'....)I like to be completely original and if a buyer likes my work enough to part with their money for it then that's a bonus!! I imagine quilt creations to be much the same.
Gal