As one of its daily deals, Amazon offers Prime members the Logitech K750 Wireless Solar Keyboard for Mac in Silver, model no. 920-003472, for $37.50 with free shipping. (Non-members can spend $49 or more to qualify for free shipping; otherwise, shipping costs $9.36.) That's a buck under our mention from a month ago and the lowest total price we could find in any color by $7. This wireless keyboard is powered by light and measures only 1/3" thick. Deal ends today.