Suppose you are shopping at a garage sale, looking for an ornate picture frame. You find one, but it has a painting. You like the frame, but not the painting. Nonetheless, you purchase it for $15.00. Later, a friend tells you she recognizes the signature on the painting and believes it's a famous artist. You take it to an art dealer and he offers to pay you $50,000 for the painting. Obviously, the seller at the garage sale made a huge mistake. Do you have a legal, moral, or ethical obligation to return it to the seller? Should you say nothing, sell it, and keep the proceeds for yourself or share?