Never at the same time but I have had 2 N64s.
I sold one to my sisters friend for £30 with a game and a controller.
1 week later I bought my sisters N64 off her for £10 with it's controller, Mario Kart and Snowboard kids (and a dull rugrats board game)
best deal ever... I was basically paid £20 to swap a terrible army men game with 2 great games (and a dull game)