I bet it's because it was recently announced that the Mario Maker 1 servers would be shutting down. There's a group called Team 0% that is trying to finish every unfinished level in Mario Maker. There's a push in the community to get everyone to help. I wouldn't be surprised if this person bought a Wii U to help.

Here's a YouTube video about it (2 mins 54 secs)

that thing i so getting homebrewed.

Where can I buy a new Vita?

This has to be old or a reseller