Amazon has the HyperX Alloy FPS Mechanical Gaming Keyboard 460 at Amazon (Red, HX-KB1BL1-NA/A1) for $60 with free shipping. List price: $80.. Features full size (104 keys), Cherry MX Blue mechanical keys, game mode, 100% anit-ghosting, full N-key rollover function.
Has excellent Amazon Reviews.
eBay has the Razer Cynosa Chroma Multicolor RGB Gaming Keyboard for $35 with free shipping.
Amazon has the Logitech K750 Wireless Solar Keyboard for Mac (920-003472) for $38 with free shipping. Features uses any light source, measures 1/3" thick.
Amazon has the Razer BlackWidow Essential Esports Gaming Keyboard (RZ03-02630200-R3U1) for $50 with free shipping. List price: $55. Designed for prime performance—featuring Tactile and Clicky Razer Green Mechanical Switches for faster actuation, and a durable 80 million keystroke lifespan.
Has good Amazon Reviews.