> A van gogh isn't more expensive than my drawing because they're rarer or built with rarer materials. Intrinsic value is much more complicated and subtle than that

Actually, value is subjective. For example, if I didn't know I could sell a Van Gogh for a lot of money, it would be just as worthless to me as anything else I don't want.

In other words, a Van Gogh, just like everything else, has no "intrinsic value" that everyone would recognize.

Now if I could buy a Van Gogh for $5000 and sell it for $10000, I'd be happy to buy one. But if I could only sell it for $5500 it wouldn't be worth the trouble for me.

That's subjective value at work again. In the latter case, I'd value the time needed to buy and sell the painting higher than the $500 I could get from the exchange.