Newegg offers the Xerox Phaser Wireless Laser Printer, model no. 3260/DI, for $79.99 with free shipping. (Add it to your cart to see the price.) That's the lowest total price we could find by $70. It features a print resolution of 600x600 dpi, prints speeds of up to 29ppm black, 150 sheet load tray, 802.11n wireless, and USB.
Update: Specs corrected