Gibson got its own entry in the Guinness World Records with this $2 million SG built in conjunction with Hong Kong jeweler Aaron Shum, founder of Coronet Diamonds Officially billed as "the world's most valuable guitar," the Eden of Coronet features the Min-ETune system, is guarded by a pair of burly bodyguards at its Musikmesse display, and is the only 2015 production Gibson we've seen with a nut that wasn't brass.