The Most Valuable Collectors' Items in History

88. Upside-Down Ball Mason Jars

Brand: Ball & Kerr
Original Price: $0.80*
Value Today: $1,000*

If you're a glass bottle collector, you might want to check your cabinets, as this rare Ball Mason could be worth thousands of dollars. The Ball Mason Jar Upside-Down is actually the result of an error in the bottle mold. The logo and name were printed backwards. Only a dozen of these bottles exist in the world, making them valuable collectors' items.

The flasks were made between 1900 and 1910. The flasks could rest on their caps without tipping over. The upside-down Ball Mason is not the only valuable jar of its kind. The Willoughby Stopple, another defect, could also fetch thousands at auction.