Monoprice offers its Monoprice Select Series Full-Size Blue Switch Mechanical Keyboard for $19.99. Coupon code "ADD10" cuts it to $17.99. With free shipping, that's $14 below our mention from last July and the lowest price we've seen. (It's the best deal now by $32.) It features Blue mechanical switches and laser-etched keys and can register up to 10 keys at once without ghosting.