Art has value. the acquisition cost people wont sell below. but the auction PRICE is not the value.
art has values(dont confuse the economic value to the aesthetic/desire/demand values of sentiment)

values and value are different categories.

think of the sentiment values(aesthetic/desire/demand/provenance) of art as the values(utility/function/features) of houses and bitcoin.
the values. help cause some speculation of the price above the economic VALUE of something comparative on the market.

the values(aesthetics/desire/demand) of a van gogh increase the price above the value of a lesser known artist