I got one some time ago it was my goal in the game to just loot one of them, the only thing is you might spend all your time to get a legendary or you can loot some of them in no time, you have no guaranty to get one. some people would ask themselves why would i play a game where i need to grind like hell to make my armor and play and get nothing from this time spent?. Personally i don't have the time to play all day NI to increase my chances.
Wielder of the Grosse Messer, bringer of walls, player of the best class in the game.