Monoprice has the Dark Matter by Monoprice Collider Wired RGB Mechanical Gaming Keyboard with Full N-Key Rollover (Cherry MX Red switches, 37988) on sale for $43 with free shipping.

Monoprice is also currently selling it for the same price via third-party storefronts at Target (REDcard holders still get an additional 5% off in cart), Overstock, eBay, Walmart and SHOP.com.