though the games that will be super hard to get are usually the ones with tiny prints because they're crap. There's a list somewhere for Wii where you've never even heard of the 10 hardest to find games.
I got a good score (upgrading/adding big box amiibo bundles to my collection of yoshi/mario party etc)
also got sonic lost world and devils third, tried playing them. Devils third was pretty fun but decided to sell to a person on a nintendo fan group who had wanted them instead of keep them and never play...even if it gets rare I don't think its a game I need in my collection