Lustdust Pro Glitter. Someday I will buy it from ebay or swap it, but it seems so hard to find.
I'd also like Deckchair pig, but that's easier to find. 187 brush is WAY high on my list, but I'll be getting it as soon as I have the funds.
So Lustdust is definately the one item that I really really want that seems kind of out of reach at the moment.