Worse one I've seen; my Father in Law is changing his oil, the new oil came from Wal-Mart. He opens the oil and realizes that someone put their old oil in the containers and returned them.

He took it back and told the Wally World folks what happened, and they exchanged it for him. He got lucky. I really don't know how he didn't notice that the seals were broken.

We bought a new printer from a brick and mortar. When we got it home, we found that it was used. All the ink had been used up and then it was returned. Took it back the very next morning at a different location. That location said that they open items like this up and check them, and that it never would have made it back on the shelf at their store.

Got to be on the lookout in today's world.