Those are fantastic prices. The only places I've seen anything similar are Costcos with sale items (e.g. a Lagavulin 16 for ~$45, which is less than half what it goes for in VA ABC shops), and courtesy of a friend who shops at "Class 6" stores (e.g. at the military PX, where apparently it's tax-free).

I really like the single barrel Four Roses, but it usually sets me back $40.