Reportedly 450 were ever made and for NA only. They were only won through various contests held by Sony or other 3rd party.
huh? no way. i have this too... i bought it MONTHS after release... saw it at gamestop and just picked it up on massive discount.. i wouldn't be able to tell you the cost now, but i think it was $80 after discounts. there's no way only 450 were made, of a series that sells WAY more than hyperdimension neptunia, yet the limit-1000 limited edition of HDN re;birth 1 sold out in
less than one minute... i don't know who ever told you that there was only 450... but they're absolutely ridiculous. unless you just mean the 'not for resale' serial... but otherwise, i see NO difference between that one and the one sold through GS. i could even take a pic of the helghast helmet and sniper figurine if you wanted to verify... granted, my sniper has, ahem, smoke damage.
speaking of that HDN:
i own this bad boy. i use the case and phone strap. no regrets.
other than that i don't think many of my games are too rare that i know of... maybe super mario RPG on SNES? i got that one from my parents for c hristmas one year.
and maybe darksiders 2 limited edition (PS3)... with the comic book intact? and the paper sleeve?
the world ends with you... CIB?
??
i don't know if anything else is rare.