Civilization VI for Nintendo Switch. I believe this is the equal cheapest its been (it's also $72 from MightyApe, but they have $5 delivery, and I believe it was ~$72 from eShop in the past as well).
Don't forget Cashrewards (5%) or Shopback (6%) to bring it down to ~$69.
Very addictive game. I think it works exceptionally well on the switch.
Hard game to put down once you start.
I have found the switch version starts to slow down per turn around the 350 turn mark. Each turn seems to get slower