Let's move back into the realm of more common objects - hands up how many people once convinced themselves they were the next big thing in rock and roll and bought themselves an electric guitar when they were younger? Keep your hand up if you gave up on learning to play it before you ever made it onto a stage. Yep, us too. If you still have that guitar hanging around somewhere, though (possibly because you're convinced you're still going to learn how to play it one day), you could be sitting a two-million-dollar asset.
The two best-known brands in the guitar world are Gibson and Fender; they have been for years, and they still are today. They've been in business for decades, and each year's design becomes a vintage. That's why a mint-condition Gibson Les Paul from the 1950s is worth more than $100,000. To give real value to a guitar though, it needs to have passed through the hands of a legendary musician. John Lennon's Electro-Acoustic J-160 went for $2.25m at auction in 2014.