How much for 3DS, Wii, and Wii U?

I'm in the market for a Switch, so I was going to sell my other consoles. The 3DS is black, and has the stylus, a case, Mario Kart 7 3ds and Kingdom Hearts: Dream Drop Distance (3ds). The Wii U has games such as Spiderman, Donkey Kong, Super Smash Bros, Splatoon, Just dance, along with a few wii games. (Wii... show more I'm in the market for a Switch, so I was going to sell my other consoles.
The 3DS is black, and has the stylus, a case, Mario Kart 7 3ds and Kingdom Hearts: Dream Drop Distance (3ds). The Wii U has games such as Spiderman, Donkey Kong, Super Smash Bros, Splatoon, Just dance, along with a few wii games. (Wii fit, includes board.) Lastly, I have the plain Wii system. It's black, and includes a light up green remote. Also, is this a good investment? Is the switch worth it?
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