The Wii U has issues worth noting if you’re buying used. I’ve had my hard drive corrupted, requiring a mail-out repair. Also replaced a analog stick that got the same drift problem that the switch analog sticks have.
and yes, the sensor bars do burn out after years of use. Cheap to replace though.
it is kind of funny how the Wii hardware is basically worthless, while the Wii U commands $150-200 here. Never dump your unpopular Nintendo systems, they’ll always have value.