From what I've heard, the easiest way of turning a stolen painting into cash is by, in effect, selling it back to its legitimate owner. You do this by using a t

From what I've heard, the easiest way of turning a stolen painting into cash is by, in effect, selling it back to its legitimate owner. You do this by using a trusted agent who collects a "reward" for helping to recover the painting, but in a manner that does not reveal who stole it in the first place. It's not easy and it can go wrong, of course, but it's presumably easier than finding a real-life James-Bond-villain to buy it from you.