As one of its daily deals, Newegg offers the Microsoft Natural Ergonomic Keyboard 4000, model no. B2M-00012, for $19.99. Apply coupon code "VCO" and use Visa Checkout to drop it to $17.99. With free shipping, that's $2 under our June mention and the lowest total price we've seen this year. (It's a current price low by $12.) This USB keyboard features a split-key layout, programmable multimedia keys, and integrated palm rest. Deal ends today.
Note that this coupon can only be used once per customer.