Has anyone here bought a game just for the sake of completing a series?

For example, I had NHL 2003, 2004 and 06 for my Game Cube and it annoyed me that I never had NHL 2005. So yesterday while my friend and I were at EB Games I bought it for $7.99 (CND). The cashier sorta looked at me weird and my friend smacked me a few times saying it was a waste of money, but now when I look at my games there's no gap, and I get a weird satisfaction out of that.

So has anyone else done something like this before?



(And don't even get me started on how NHL 07 has been released on every platform minus Game Cube )