Brother HL-2270DW Wireless Duplex Monochrome Laser Printer for $81.98 shipped.  Here is a screenshot for your reference.  It prints up to 27 ppm at 2400 x 600 dpi and features duplex printing,  wireless 802.11b/g, Ethernet and USB connectivity.  Most places have this Brother HL-2270DW Wireless Duplex Laser Printer for about $98.