LOL!!! I have that too! Along with a bunch of other vinyl picture disks incuding some Metallica (Jump in the Fire - monster shaped disk), Slayer (Live Undead, Hell Awaits), Helloween (can't remember for sure), Exodus (Pleasures of the Flesh), etc... I have some fairly rare (I believe ) Mercyful Fate on vinyl. Curse of the Pharaohs has King on the front without makeup. Pretty sure that some of my other vinyl would be of the rare persuasion too. I know I have Fates Warning Night on Brocken on vinyl but can;t remember which cover(s) I have. Pretty sure I have one of the first two covers, but may even have both. Its been a while since I looked over my vinyl.
I also have 1 of 200 Power of Omens original demo cassettes from back in the mid-90s.
Probably the rarest thing I own is a promotional chunk of marble with the Metallica logo blasted onto it from the And Justice For All days. I also have a Metallica promo sampler called "Mandatory Metallica." I have a bunch of other crazy promo stuff from when I worked at a music distributor back in the late 80s too.