I'm actually very proud of the fact that I've recently been cutting down immensely on random purchases. Unless it's a big project I'm planning to 100% tackle in the near future, I've sold off tons of spare stuff (even if I regret some of it later). Trying my best to really focus on one or two projects at a time, see them through to relative completion before moving on. It's...taxing, but so far pretty rewarding.
That being said...when I come across something like that ship set I'm always horribly tempted. That's an entire game in a box just waiting a set of rules. So while I don't normally give in to buying random blisters of miniatures - boxes or "sets" like that are awfully tempting.