I found that bottle of Ardbeg Drum in Nashville when we went there for my daughter's wedding. We took my brother in law to a liquor store and he damn near pissed himself when he saw the stuff sitting on the shelf. Five bottles of it. He bought two and I went back and got mine after I tasted his.
This stuff was a limited edition (Ardbeg releases at least one limited edition a year) and it sold out pretty quickly. It was only on the shelf because of certain rules in the liquor industry, it had been reserved but never picked up and the store had to hold it for a certain amount of time. We likely saw it the same day it was put on the shelf.