Today only, Newegg via eBay offers Diablo III: Eternal Collection for Nintendo Switch for an in-cart price of $39.99. Coupon code "PICKUPSALE" cuts that to $35.99. With free shipping, that's the lowest price we could find by $4, although it was $2 less earlier this week. It features the Diablo III game, Reaper of Souls expansion, and Rise of the Necromancer.
Note: The above coupon can be used once per account, with a $75 maximum discount.
Beware these cash-guzzling missteps when you stop at any gas station.