Best Buy offers the refurbished 2nd-generation Apple AirPort Express 802.11n Wireless Base Station, model no. MC414LL/A, for $59.99 with free shipping. That's tied with our mention from July and the lowest total price we've seen for this model. (It's also a current price low for a refurb by $5 and $26 less than a new unit.) 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.
A 90-day warranty applies, although it's unclear who backs it.