Amazon has the Anewkodi Ergonomic Wireless Vertical Mouse (Black) for $25.99 - $16 off with coupon YEXC5B8W = $9.99 with free shipping on $35+. List price: $61. Features switch between DPI levels 800, 1200 and 1600 to adjust mouse responsiveness.
Has good Amazon Reviews.
Amazon has the Jelly Comb Slim Wireless Keyboard and Mouse Combo (Black) for $16 - $6 off with coupon NM2EN8PK = $10 with free shipping for Prime members or on $35+. Retail price: $29. Has good Amazon Reviews.