Previously unseen footage from a 1990 Nirvana concert — filmed for fun by two videographers before the band rose to fame — is being offered at auction, where it is expected to sell for up to $150,000.

Previously unseen footage from a 1990 Nirvana concert — filmed for fun by two videographers before the band rose to fame — is being offered at auction, where it is expected to sell for up to $150,000.