131 key items
Keys and access items.
By quality: 89 common, 24 rare, 10 epic, 8 uncommon. Item levels run from 1 to 77, for characters from level 1 to 60. 43 bind when picked up and never reach the auction house; 88 can be listed.
The highest item levels here: Linkue Combatant Icon (77), G00 DV-1B3 Generator (70), Beacon of Hydraxis (60), Bubbles' Ribcage of Ribaldy (60).
One profession makes 1 of them: Engineering (1). The rest drop, are sold by vendors, or come from quests.
Source: World of Warcraft: Forever game data and Blizzard's Game Data API. Updated with each game build.