Hmm. The times I bought obsolete computer equipment off eBay for way more than was intelligent (stuff that never got used) to be used as game servers. That was pretty much my first real encounter with retardedness.
Next, the time I bought a copy of a $70 game for $233 (X68000 Akumajo Dracula; I have two copies now and it'll be a while before I offload one, if ever - not at that price). Or the time I bought the whole (at the time) Samurai Spirits series, and have yet to play any of them outside MAME.