Most of my rarer MAC stuff is fairly recent, but will be pretty rare one day.

MAC Playboy Bunny Lipstick
Viva Glam II in original cylindrical casing.
Lure e/s in Waternymph and Mancatcher
Lure l/s in Goddess
Sweetie Cake's Pink Meringue
Catherine Denueve Icon's Beauty Powder in Tahitian Sand
Lipstick in Kid Kat (discontinued)
MAC Barbie lipgloss Malibu Barbie (HOLY GRAIL!!!)
MAC Barbie lipstick in Real Doll
MAC Barbie eyeshadow in Magic Dust

And thats it!