My buddy and I found a gallon sized ziplock bag STUFFED WITH WEED in an arcade machine.
We were at the sellers house at the time. We saw it in the coin door, laughed and closed it quickly. The seller eventually remembered and was so embarrassed with the "Uh, sorry guys but I hope you don't mind if I grab this..."
I said "Hey cop didn't see it, you didn't do it"
We hypothesized about what the protocol would have been had we gotten the machine all the way home and found the weed there. Keep it? Call the seller back and tell him or just ignore the situation like it never happened?