Post redo.
WotC:
Player's Handbook
Dungeon Master's Guide
Monster Manual
Monster Manual 2
Monster Compendium: Monsters of Faerûn
Psionics Handbook
Manual of the Planes
Deities & Demigods
Tome & Blood
Forgotten Realms Campaign Setting
Magic of Faerûn
Faiths & Pantheons
Oriental Adventures
Sword & Sorcery:
Relics & Rituals
Creature Collection
Creature Collection 2
Tome of Horrors
Mongoose:
Seas of Blood
Edit: I completely forgot I also have OA.
To be exhaustive, I could add Dragon #285, the only issue ever I was able to get. My opinion on Dragon is that it's too expensive, not useful enough, and too hard to come by to be worth the efforts.
If I were rich, I would have taken Everquest d20. Just out of curiosity, to see the magic system, and because it has the cheapest price per page ratio in the d20 market (broadly taken). But I'm not.
I havn't included here all the non-d20 stuff I have (and I have much).