Buy.com offers the Logitech K750 Wireless Solar Keyboard, model no. 920-002912, for $54.99 with free shipping. (See this price at the final stage of checkout.) That matches last month’s mention and is the lowest total price we could find by $5. (However, we saw it for $47 shipped in July.) This wireless keyboard is powered by light and measures only 1/3″ thick.