Maker: Xero (Now Called Linkin Park)
Original Price: $7-$9*
Worth Today: $4,500*

You might not recognize the name “Xero,” but you’ll know the name Linkin Park. Linkin Park called themselves Xero before changing the band’s name, and Xero was their self-titled, debut demo tape. The tape was recorded in 1996 and 1997 and released in November of 1997. The cassette tape is twelve minutes, thirty-six seconds long.

Produced by Mike Shinoda, Xero was influenced by what the band was “currently listening to.” Shinoda said that all the vocals were recorded using a Shure SM58 microphone. Though Xero was a bust when it released, Linkin Park took off in 2000, which upped Xero’s value and made it a classic piece of the band’s early history.