I do art for a living and even though something might take me longer than I expected when quoting somebody well, do I stop working at the point of value or make it look the way I want others to see it and lose profit? I lose the profit.
but if I make the piece first and sell it at $:hours (like the shoe/jeep) I have to hope someone sees it at that value. My point; Is the buyer being scammed? No . Does the artist care if it is ever sold? Yes & no, if the price is haggled. Will the buyer be the only person in the world to have it? yes, would you care about that, maybe, but that should be a great consideration.