Limited and first press editions

[PinkShinigami]

Gaah. The most of my activity in this forum is questions, feeling stupid >.<

Whatever. I have only just started thinking about all that limited edition - first press things.. And i really need help! I'm looking for a complete guide for it. I only know angel-ayu.de, but it doesn't help much.

Looking for something/Someone that can list all first press editions and limited editions, and explain what's special about this releases.

It's because i try to do a complete discography (Something i haven't ever seen, so i want it to be real!)

Help, please?