It's a whole lot better to create art first. "David" was commissioned for an equivalent of about $25-30K. Some years ago in Rochester (NY) on Lake Avenue there was a contemporary "sculpture" which was resembling an oversized hex nut, maybe 15 feet in diameter. If memory serves, the city paid for it about $50K. May it serve as an illustration of the dubious validity and worth of what passes for contemporary art. The proper valuation for it is precisely the cost of materials minus the cost of removal.
Then again there have been men who have spent really big money on women I would not consider of value...Beauty and value are highly debatable
What do you care what something is worth unless you own it?