Nintendo eShop takes up to 50% off a selection of Nintendo Switch, 3DS, and Wii U game downloads, with prices starting from 59 cents. A couple of best bets:
NBA Playgrounds Enhanced Edition for Nintendo Switch for $9.99 (pictured, $10 off)
Phoenix Wright: Ace Attorney - Spirit of Justice Nintendo 3DS for $14.99 (low by $15)
Need to make a quick buck? Here is a host of opportunities -- many of which you may not know exist.