I am GUESSING that any potential ROI would accrue so slowly as to make the $1.5M price tag just a smidge on the pricey side. However, perhaps somebody like Mark Cuban doesn't want to pay royalties for playing "Cotton Eye Joe" anymore, and the obvious alternative of simply not playing the song won't come to them until after they've cut the cheque. ;-)
Me, I would rather have sprung for some shares of David Bowie back when HE was selling.
Then run out and buy Lucky 7 by the good Reverend Horton Heat. Imagine Dick Dale hops in his El Camino, picks up Social Distortion, and heads over to the Love Shack to party with the B-52s. Awesome, awesome, and very toe tapping.