Art is money: discuss.

It's a debate that's been going on since the first caveman said to his mate: "I say old man, that's a damn fine handprint you've just done there. Could you do one for me? It'd look just splendid in the cave. I'd gladly pay you. Some meat perhaps? Or my wife?"

Those crazy japesters Jake & Dinos Chapman have created some downloadable defaced cash as part of the BBC's Imagine programme How to get ahead in the Artworld.

You've got from now until Thursday 22 November at 10.35pm (GMT) to go get yours. Who knows, maybe one day it will be worth something. Money might not grow on trees, but you can download it.