The minds of a lot of Dads, worldwide, must be boggling right about now. Not only is there a new record for the most expensive guitar ever sold at auction, it’s A. An item deeply connected to the legacy of Pink Floyd, and B. contributing almost $4 million to charity in the process. Regardless of your opinion of a media mogul like Indianapolis Colts owner Jim Isray, the guitar’s new owner, that is still one heck of an impressive figure. And David Gilmour’s legendary “Black Strat” wasn’t even the only item that Isray picked up at the Thursday auction from...