When the guitar Kurt Cobain played in Nirvana\u2019s \u201cSmells Like Teen Spirit\u201d music video went up for auction, its estimated value was between $600,000-$800,000. But the final price far exceeded those estimates. Indianapolis Colts owner Jim Irsay ended up buying the left-handed Fender Mustang for a whopping $4,500,000. \u201cI am thrilled to preserve and protect another piece of American culture that changed the way we looked at world,\u201d Irsay said in a statement. \u201cThe fact that a portion of the proceeds will go toward our effort to kick the stigma surrounding mental health makes this acquisition even more special to me.\u201d \u201cTo have this legendary guitar, one of the most culturally significant and historically important guitars of Kurt Cobain and in all of rock music history return to my home state of Indiana to be part of Jim Irsay\u2019s renowned memorabilia collection is a great honor and personal highlight of my life,\u201d said Indiana native Darren Julien, President\/Chief Executive Officer of Julien\u2019s Auctions. \u201cThis once-in-a-lifetime auction has been one of the greatest privileges in my professional career and I\u2019m duly pleased that the proceeds will also bring much needed attention to mental health awareness.\u201d In addition to the guitar, Cobain\u2019s 1965 Dodge Dart and an accompanying NFT also sold for $375,000. See what other famous items sold at Julien's Auctions' Music Icons showcase here. Though $4,500,000 is a hefty price tag, it isn\u2019t the most expensive guitar played by Cobain. In 2020, the acoustic 1959 Martin D-18E he famously strummed for MTV Unplugged sold at auction for a record-breaking $6 million.