But in this scenario, an honest person would tell the finder about the reward and give him the contact info. It only works if the shopkeeper gets greedy and keeps the reward a secret.
And then the finder miraculously has to be somewhere soon, or is traveling on their way somewhere else, and would happily give up a portion of the reward if they could just be allowed to leave...
At that point, the less greedy the mark, the more they lose.
