Unveiling the World's Most Valuable Collectors' Items

4. Pogs (Original Price: Free Worth Today: $10 for a large collection*)

Remember the 90s Pogs craze? Those bottle cap collections ended up cluttering attics and basements. Pogs were actually caps from a drink called Passionfruit Orange Guava (POG). Although they're not worth a fortune, you can sell a large collection to nostalgic collectors for around $10. Individual caps go for less than a dollar.