Peraion Graufalke
First Post
I'd keep it all, except maybe Heroes of Shadow (game mechanics are weak) and the Tomb of Horrors (never been a fan of it).
Nothing afterward ever quite compares to the Fighter, Ranger, Cleric, Paladin, Wizard and Warlord from the first Players' Handbook.
Next the dungeon tiles. Why keep?
The two DMGs - again if you've the DMs kit you don't need them although they were worth reading.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.