I hear that. I've done similar myself on many an occassion, but not quite as often as I've thought "ooh, that's cheap, let's see if they knock another quid or two off it next week" only to come back and find the last one's been sold.
And yes, Dystopian Wars and Leviathns are certainly on my radar (they do some things I think are great, other stuff I'm not so keen on, but definitely reference points for what I'm planning.)