N64 controller, what's the best?

ok so i can use a ps1 usb controller for the classic consoles, but what would i use for the n64? i mean it's the most bizzarr controller and i haven't found any n64 usb controllers on the web. though i HAVE found an adapter for the usb, but i don't want to spend $50.00 on a new n64 controller, so fvck that.
what im asking is: what do YOU guys use for the n64? what method in order to play the emulator happily?
(give details please)

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