What're Your B.O.S. Items?

Over the months that I've been playing CastleVille Legends, I have come up with a list of items that I have to buy from the marketplace, no matter what. I call these B.O.S. (buy on sight) items. Basically, when I see something like a spellbound orchid, everlasting bubbles, or rubies, I buy them, even if I already have a large amount. Do any of you do this? Yes, I know I sound like a hoarder but you never know when you'll need these things in the future. Besides rare items, I also consider tents, plain gloves, dragonwing torches, and grappling hooks B.O.S. items as well.

Here are some of my B.O.S. items...

So tell me, what are yours and why? :)