All Things Vend

Missable. During the side mission "Vend of the Line", after you beat the Vend Zane boss you must use the Legendary Vending Machine in the exact order: sell 3 green (uncommon) items, then buy the $1 legendary. Do it before the mission ends - you can't replay it on the same character. If you slip, it's recoverable in post-story New Game+ or by joining a co-op game at that step. Pairs with Rift Incompatible as the game's only two missables.