Amazon has the Logitech K585 Multi-Device Slim Wireless Keyboard (920-011479) for $30 with free shipping for Prime members or on $35+. Features compatible with virtually all devices and computers, built-in cradle, 24-month battery.
Has excellent Amazon Reviews.
Amazon has the Corsair K70 Pro Mini Wireless RGB 60% Mechanical Gaming Keyboard (Red Switches, White, CH-9189110-NA) for $64 with free shipping. Has excellent Amazon Reviews.
Amazon has the Cooler Master 60% Wireless Mechanical Keyboard (SK622, Sliver White) for $28 with free shipping on $35+. Features RGB lighting, adjustable feet, and low-profile switches.