Why would you buy a Wii U now? It costs basically the same, but it's out of production and won't get any new games.
Out of curiosity, other than standard Wii games which ones are you including here?
For example, I saw refurbished Wii U consoles for $200 the other day, and I'd be hesitant to spend $100 or $150 on a device with no warranty. But for $200 it's not crazy to think you might as well go for the Switch at $100 more.