Newegg offers the refurbished D-Link 16-Port Unmanaged Gigabit Rackmountable Switch, model no. DGS-1016D, for $34.99 with free shipping. That's tied with our refurb mention from last month as the best price we've seen, and $80 under the best price we could find for a new one. It features 802.3, 802.3u, 802.3ab, 802.1p, and 802.3x support. Deal ends September 3.
A 90-day warranty applies, but it's unclear who backs it.