Jailbreaking the Wii U is a little bit more involved as it requires some “special” equipment. It’s in quotes as not many are going to have a USB A to ethernet adapter, nor a compatible model, but they aren’t all that rare either. But once it’s done you don’t have to worry about jailbreaking it again. Dumping Wii U games isn’t much harder than GC/Wii either.

Not OP, but I have dumped my own collection of GameCube and Wii games.
The easiest way to do it is with a jailbroken Wii since it’s not hard to do. Once jailbroken, the dumping process is about 12 minutes for a GC game and about 20-30 minutes for a Wii game (I forget the exact time). So with that in mind, you can make a rough calculation for how long it will take to dump your collection.
There are a few unmentioned steps, like converting the games from .iso to .rvz to save on space, but it’s rather easy to get going when you have a guide to follow.

I personally look to see if the company has their own storefront. And sometimes it pays off in unexpected ways.

For example I was in the market for a soldering iron. I found a solid Hakko one on Amazon, but I decided to check their site first and, lo and behold, they had the exact same one for sale for the exact same price. BUT I could choose what color I wanted; Amazon only had the standard blue/yellow, whereas they had two other color choices.
On top of that they included an extra goodie of my choosing, which I chose their coffee mug (I forget the other options).

So because I took the extra time to look around, I was able to get one in a color I preferred, got an extra item out of it, and cut out the unnecessary middle man. Win-win-win as they say.

Sometimes, though, it’s just not possible. I was in the market for a triple monitor stand as I use a unique configuration (ultrawide as my main, with two regular widescreens side-by-side above it). The only viable stand I found was available either through Amazon or Walmart. They did not sell directly from their site. So I had to choose which devil I wanted to support.