Cable boxes at the scrap yard
I was at the scrap yard yesterday. I saw a guy start to throw cable boxes into the shred feed/tin pile. I said "hey my friend, those cable boxes have valuable boards in them." He looks at me puzzled and says "whhuuuuttt...." I grab my hatchet/hammer and 5 seconds later, I have the lid(top) removed with the board exposed. "That board right there has tiny amounts of precious metals including Gold and is worth $2-$3 per lb if you sell it to a specialized buyer of boards." His reply "I ain't gut no time fer dat."
Knowledge is one of the most greatest things in the world. Many people refuse to take the time to learn something new.