The most I have bunkered is ND OT 80 proof - a dozen 750s + some handles, which I picked up for $5 a piece. Most have torn or missing labels. For the price it is unbeatable.
I tend to bunker for breadth rather than depth, with a decent amount of bourbon, whisky, and rum. If I find a good price on something I stock up... I have a decent amount of Ritt BIB, FRSBLE, GTS, WTR101, Appleton 12, and Mount Gay Sugar Cane Brandy. Also a bunch of Compass Box Asyla I picked up cheap for cocktails.