Original Wii? The rise in retro being cool combined with exponentially exploding collector / reseller fever. People who missed the boat with NES, SNES, N64, GameCube are trying to get in early on more obtainable newer stuff and so are hoarding even brand new stuff now. As original Wii in it's box isn't in stores anymore, and warehouse stock for online retailers has ended, it automatically goes up 3x from eBay resellers. Even more if it's the OMG COLLECTORS LQQK SUPER ULTRA RARE ORIGINAL WII WITH GAMECUBE PORTS!!!!1!1!1!1!1! model.
It's amusing , if anything.
Wii is hardly limited supply or collectible other than a few niche low print games. Too many of them.