40gb ps3 with joker

[Matrix6]

I highly doubt that is an official release of any sort, the only official Batman theme consoles of this generation was made for Xbox360.

With the little details provided for you, it sounds like it's a phat PS3 with [original] 40gb hdd. Those were phased out before Batman Arkham Asylum was released in August 2009, by early September the slim PS3's were released as well.

So there's virtually nothing to back up any claim of this being official at all whether it was a once off prize or an extremely limited run?! [as far as I know].

As for rarity, it would be as rare as any personally custom made/modded console.