Never bought a box, but my son buys them occasionally, and I get one copy of any duplicates he gets, so I've amassed a fair (but sporadic) collection that way. We both use them for our respective D&D games. (He's in my campaign when he's here, and in a different campaign when he's at college, where he's the primary miniatures provider.)
I have bought one or two individual minis from my FLGS, though - I couldn't pass up a grell for two bucks when I wanted to run "Pakalillir" from Dungeon magazine, for example, and I bought a timber wolf for a buck as a gift to the 10-year-old who plays a ranger in our game after his PC got a wolf animal companion.
Johnathan
I have bought one or two individual minis from my FLGS, though - I couldn't pass up a grell for two bucks when I wanted to run "Pakalillir" from Dungeon magazine, for example, and I bought a timber wolf for a buck as a gift to the 10-year-old who plays a ranger in our game after his PC got a wolf animal companion.
Johnathan