How rare is Pochi to Nya for PS2?

I just found out that there exists a ps2-port of the compile game Pochi to Nya (Pochi and Nyaa).
I've never seen this game for ps2 anywhere as far as I can remember (certainly not when I was in japan last year anyways) and was wondering how rare it is?

There is no copys on ebay but one copy up on yahoo auctions ending in 18hours (now at 4400yen or something).

I'm not really interested in this myself since I have the game on MVS but how rare is it for PS2? It's not even on gamefaqs.com :lol:

edit: This is what the box looks like

 

Ign has a preview and other news, so I would guess not so rare as to be completely unheard of

 

That game is not rare at all.Play Asia is selling the PS2 version for US$ 49.90
Check it out.
http://www.play-asia.com/paOS-13-71-42-49-en-15-Pochinya%2B-70-9gj.html

 

Oh, thanks
Since the title was written incorrectly I couldnt find it.