Brad sez, “Trusty Sword, an Olympia, WA-based RPG developer, has posted hundreds of scanned D&D cover art from dndclassics.com [a site where you can buy all the classic D&D modules and books as ebooks, though some are larded with DRM] to Pinterest. It’s awesome.”
D&D 1.0 (AD&D) Cover Art on Pinterest
(Thanks, Brad!)