I once had a gallery tell me I should raise my price on an item, but I knew theirs was the only store who could charge that much. I can't support myself selling to just one store, no matter how much they get for something. Working with a gallery as a painter sometimes is a little different. The gallery may set the price, being more familiar with the market. I'm sorry, but I don't believe in strokes of genius.
Art is a business, like any other business.
Unless you're Andy Warhol, pricing is done in the same way as widgets. Even Andy figured in overhead and charged more on things that were expensive to produce. The clay work turned into bronze is more expensive because bronze is more durable and because the clay is lost. If the mold was used to produce 100 of those sculptures, the price would drop. The extra work put into making a clay sculpture vs. a bronze one goes beyond foundry expenses.