Dungeons and Dragons Knowledge Compendium

ScurvySeaDog writes "Like me, I would bet many slashdotters where D&D players before they got their first home computer in the early 80's. This site seems to have every book, module, supplement ever published along with scans of the covers. They also have current collector values for you packrats. It was nostalgic for me to browse around looking up all the old modules and books."