I don't think they're particularly rare or anything, but regardless: my small collection of Warcraft figures. The level of detail is insane and they are/were actually very cheap compared to PVC (Bishoujo) figures.
Edit: Oh, I should probably explain why they are "holy grails" for me. Well, as said above, figures can get crazy expensive over time. Often they're already expensive at the start, but even if they're not, they will get prizy over time. These ones cost me about €50 - €80 a piece and I think the first one was released 8 to 10 years ago. That was back when I was about 16 years old and didn't make a lot of money, to put it lightly. I'm glad I bought them, though, and I have had them on display in my room for years now.
Tauren Hunter Korg Highmountain
About 24 cm high, this guy weighs 1225 g. Very impressive figure. The only downside to this one is the base, which is rather cheap and light, with short pins to fit into the hoofs. So I had to commit a grave sin and glue him to the base in order to keep him from falling over constantly.
Pandaren Brewmaster Chen Stormstout
About 20 cm high. While the Highmountain figure's base was bad, this one doesn't have a base at all. So you have to make sure he's supported by a solid, heavy object (one of my room's walls in my case) to keep him from falling. Still an impressive figure all-around with various glassy ornaments. The bamboo pole with the jug and oil lamp (?) are a nice touch as well.
This one actually costs about $25 on Amazon right now, which is a
huge steal.
Other ones I have:
The Warchief herself, Sylvanas Windrunner
There seem to be bootlegs of this one on the market, as I saw a lot of pictures with wrong colors (yellow skulls on the base, for starters) and a lot less detail in general.
Night Elf Huntress Alathena Moonbreeze
Troll Priest Zabra "badass motherfucker" Hexx (this one also comes without a base, sadly.)
Note that the photos above aren't my own. I will see if I can get a group picture of them myself tonight.