Stem_Tech via eBay offers the refurbished Logitech K830 USB Wireless Mini Illuminated Living-Room Keyboard with Touchpad for $47.99. Checkout with PayPal and apply coupon code "P20FINDYOURTECH" cuts that to $38.40. With free shipping, that's $25 under the lowest price we could find for it new. It charges via USB and features a 33-foot range, backlit keys, and up to 10-day battery-life on a full charge (based on typing two hours per day with backlight at full brightness). Deal ends May 18.
Note: A 90-day Logitech warranty applies. Also, this coupon can be used once per PayPal account within a single transaction.