Sim City's a simulation game (and one of three simulation series I actually played consistently), but I didn't name any specific strategy games because I played a wider selection of titles from those. Stronghold, if my memory serves, is an RTS game (real-time strategy), while Civilization is a turn-based strategy game.
I also saw FF Tactics for the PS1 going for $99. I'm personally perfectly content with the GBA iteration, since I prefer my RPGs to be portable anyway.