What little I model... I do for myself. Either because the object seems interesting to do, or I have need of it for a project. Find high poly more rewarding, so thoughts of either giving it away or selling it... is not that serious an option. So at least in my case, working out the technicalities - so that the end result is as wanted is the reward... when the piece is done. But then I am a hobbyist, and use cg as relaxation...