I dropped a ton of money the past couple months because I ended up buying End of Evangelion and Death and Rebirth, the two Rebuild Films, and the Platinum collection. Evangelion is such an expensive series to own, but it looks so nice up there with my figures and manga. I also bought the Gurren Lagann six dvd box set, which is also expensive as hell if you can find the dvds. So I won't be buying anything else for a bit, because in total it was over $300. Can't blow ALL of my money on anime, no matter how much I wish I could, lol.
Something I regret not getting though is Higurashi's Complete Collection when it was still in print a couple years back; it's near impossible to find now.