I don't know how much were made. I believe only publisher knows the correct amount (no more than 1000-1500 I think). It's not a press kit (it's just a disc) but it was only for press. It's full game, nothing more, nothing less.
How rare it is? Just try to search it for sale, check sold auctions etc. Didn't find anything on auction sites, forums etc in past x months? Must be rare. Never on ebay, never sold. I didn't find it (there's only first edition of P5 for 166 usd on ebay).
If I won't sell it - it'll go to my collection
