One Arizona resident was visiting a Phoenix Goodwill back in 2015 in search of a used push golf cart. There, he came across a variety of old watches. One of them attracted his attention—he noticed a $5.99 watch with a dial that read "LeCoultre Deep Sea Alarm." Coincidentally, the man was a watch collector who had a particular interest in vintage watches. He realized that the watch might be worth way more than $5.99, but wasn't sure about its exact value. Therefore, he decided to take it to an authorized retailer in Scottsdale, Arizona. It was there that the man discovered that the timepiece was a rare 1959 LeCoultre Deep Sea Alarm, one of the first watches ever to feature an alarm used by divers. Quickly enough, after sharing his find on a "Vintage Watches" Facebook page, the man was overwhelmed by emails from collectors from all around the world, eager to buy the LeCoultre Deep Sea Alarm. Eventually, he sold it for $35,000. Not a bad profit from something that you got for merely $5.99, right?