Newegg offers the Corsair Vengeance K95 Mechanical Gaming Keyboard in Black, model no. CH-9000020-NA, with a $50 Newegg Gift Card for $159.99 with free shipping. (The gift card is added to your cart automatically.) Assuming you'll use the gift card, that's the lowest total price we could find by $40. This keyboard features an aluminum chassis, 18 dedicated, customizable macro keys, backlit keys with illumination level control, and USB passthrough.
Newegg offers the Microsoft Sidewinder X4 Keyboard, model no. JQD-00001, for $29.99 with free shipping. That's $10 below our July mention and the lowest total price we could find by $16. It features anti-ghosting capability, automatic profile switching, and programmable macro keys.