We knew it would command a high price but WHOA! The limited-edition, 1959 Martin D-18E Kurt Cobain used November 18, 1993, during the MTV Unplugged in New York performance, just sold at auction to Rode Microphones founder Peter Freedman for a whopping $6,010,000. It is now the world’s most expensive guitar, the most expensive acoustic guitar, the most expensive Martin guitar, AND the most expensive piece of Nirvana memorabilia in history!