Digression! American cultural artifacts

Robert Johnson was a pretty goddamn good guitar player -- other than doing much of the heavy lifting for what would become rock and roll, Johnson is -- simply stated -- an iconic figure in American cultural history. Now an auction house in New York claims to have his guitar -- thee guitar, a Gibson L1-- though they offer no proof. Yes, it's for sale -- asking price $6M. Yes, there is controversy:
Money Quote:

"If anyone is stupid enough to bid on it, they deserve what they're getting,"