yes, Janice, this is true, but the insurance companies still paid off didn't they?
That's not as clear a point of law as you may think. I'm familiar with cases in which people have bought stolen art at second or third hand, from a dealer who didn't know it was stolen or illegally exported. The people in question were allowed to keep the objects.
don't be too sure the insurance company for the Reputable Art Dealer that resold the goods isn't paying something to the insurance company that already paid the original claim as well...