What is your RAREST collector item?

[Gemini-Phoenix]

I own a lot of CE's that are limited to just a couple of hundred units, such as the Dead Island Treasure Box. Many of them are numbered 200/200, as I specifically requested this number as many people here seemed more concerned with obtaining lower numbers. I was more interested in getting multiple editions with a matching number.

I also own a red PS2 console (limited to 666 per region)

I don't think I own anything that has fewer than 200 units though.