Games like that are not worth $70 to me. I might be a buyer at $30, maybe $40. But, because Nintendo games rarely drop by 50%, I essentially never buy games like this from Nintendo. I typically only buy the big franchises (Kart, Zelda, 3D and 2D Mario, etc.) from Nintendo, because those are the only games I feel comfortable paying $60-$70 for.
The last Nintendo game outside of the big series that I bought was Captain Toad Treasure Tracker on WiiU. That was at a lower price though (maybe $40 or something like that). I would not have purchased it at the then "full" price of $60.
Incidentally, I loved the game. I'd buy a new, similar Captain Toad game if it was available at $50 or less. But, I would not pay $70 unless I saw a lot more value in it than the first one.
