For its Prime members, Amazon has the Logitech K480 Bluetooth Multi-Device Keyboard (Black, 920-006342) for $21 with free shipping. List price: $50. Features 81 keys, a wireless range of up to 30 feet, and USB charging cable and can connect to up to three different Bluetooth devices.
Has good Amazon Reviews.
eBay has the Logitech G810 Orion Spectrum RGB Mechanical Gaming Keyboard (Black) for $70 with free shipping. Features 12 programmable macro keys, Romer-G mechanical switches, dedicated media controls, intelligent RGB illumination, 26-key rollover, USB 2.0 interface.
Best Buy sells it for the same price.
Amazon has the Aukey KM-G9 87-Key Mechanical Keyboard w/ Blue Switches for $33 - $13 off with coupon NTBZ7C53 = $20 with free shipping. Has good Amazon Reviews