Lancelot
Adventurer
Best Value: Dungeon magazine subscription. Would be a bargain at double the price, given the amount of time it saves me and the (usually) high quality of adventures.
Honorable mentions to: Module B4 - The Lost City, Dragon #63, Neverwinter Nights (for the Aurora Toolset), and supermodule GDQ - Queen of Spiders. I've had years and years of use out of those products.
Best Value Core Rulebook: D&D Rules Cyclopedia (old school Basic/Expert/Companions/Masters). No contest.
Honorable mentions to: Module B4 - The Lost City, Dragon #63, Neverwinter Nights (for the Aurora Toolset), and supermodule GDQ - Queen of Spiders. I've had years and years of use out of those products.
Best Value Core Rulebook: D&D Rules Cyclopedia (old school Basic/Expert/Companions/Masters). No contest.