How Much Does Art and Craftwork Cost?

I'm sick of trying to use my brain to answer this question on the fly. There needs to be variation: Most of the art needs to be cheap, but some of it needs to be really expensive. So! Solved with one dice-roll! Hieronymus Bosch - Christ in Limbo Art Prices For New Feierland: 1) Roll 3D6, and add them up.
2) For each 6 rolled, add a zero to the number.
3) For better/worse art, roll more/less D6. 4) For large pieces, multiply by 2, 5, 10, or 20. e.g. 3D6: - 4, 2, 6 = 12 g. - I rolled a 6, so add a zero: 120 g. - If it were as big as a horse, I might make it cost 20 times that: 2400 g.