Unveiling the World's Most Valuable Collectors' Items

13. Nancy Drew Lunchbox and Thermos (Original Price: $1-$10* Worth Today: $100*)

Nancy Drew, the iconic teen detective, has been popular for years. With a recent revival in a 2019 CW show, her fame continues to grow. The novels that introduced her character spawned a merchandise frenzy, including lunchboxes and thermoses produced by brands like King Seeley.

One such vintage lunchbox and thermos set from the late 1970s is now valued at around $100. You can find these sought-after collectibles on eBay, Etsy, and other resale platforms.