MegaMacs offers the refurbished Apple Keyboard with Numeric Keypad, model no. MB110LL/A, for $44.99 with free shipping. That's $14 under the lowest total price we could find for a new one, although we saw one new for $6 less in June (although that required a $10 rebate). It features an ultra-thin anodized aluminum enclosure, two USB ports, and full numeric keypad. Deal ends October 6.
A 30-day MegaMacs warranty applies.