Working for a mechanic at night and in a body shop during the day for a few years. I have taken dashes apart and all kinds of "good" stuff comes out of heater vents or tucked away. Usually cars that were bought at auction and brought in for us to go over. Little bags of powder or whatever else gets shoved in heater vents when getting pulled over by cops....More than I would have thought before working at that place.....Money too! But that I've only seen one time and may have just been hidden by someone for emergency or travel, forgot about, then gets impounded, repo'd,..etc then ends up at auction.