As one of its daily deals, A4C offers the refurbished 2nd-generation Apple AirPort Express 802.11n Wireless Base Station, model no. MC414LL/A, for $49.99 with free shipping. That's tied with our February mention of a used unit and the lowest total price we've seen. (It's also $19 under the best price we could find for a new one.) This device uses 802.11n to play iTunes over your wireless network to your home stereo, acts as a wireless router, and enables wireless USB printer sharing. Deal ends today.
A 90-day A4C warranty applies.
Looking for a new one? Adorama offers its for $69 after rebate with free shipping.