You'd have to be nuts to buy that place, even if you had more than enough money and fancied the view. Tourists and Mafia-wannabees would be ringing the doorbell day and night, sneaking on the property, taking "souvenirs," being general pains-in-the-ass. The last thing I'd want to do is to buy a home owned by anyone famous--and especially, notorious.
To be honest I think people that are into this thing of "ours" wouldnt have the money to buy the place in the first place ;-)
Also if I was gonna spend 18 million I'd want a more secluded spot for my money.
