To celebrate Sonic Anniversary 2019, SEGA has opened a SALE OFF event for all digital titles of Sonic series available on Switch (Nintendo), Wii U (Nintendo) and 3DS (Nintendo) systems. This event applies for Nintendo eShop of America only, lasts until June 26th, 2019 and offers various sale off rates range from 25% to 50%. The list of all of sale off targets can be referred here ¹, and it is worth noting that Team Sonic Racing which just came out on May 21th, 2019, is also under 25% OFF making the price down to $29.99 (tax excluded).
1) The currency used by American Nintendo eShop is US Dollar, hence purchase with other currencies will lead to currency exchange fee charge
2) American Nintendo eShop doesn’t have region restriction, so any customer can easily purchase games directly from there as long as owns a Nintendo account had the country set to America