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Last checked on Amazon:
http://www.amazon.com/Xerox-3610-DN-Wireless-Monochrome/dp/B00ET9IA5A/ref=sr_1_1?ie=UTF8&qid=1400174379&sr=8-1&keywords=xerox+3610+dn
Brother HL-2240D Small footprint black and white double-sided printer. This printer is for a single user environment only.
Last checked on Amazon:
http://www.amazon.com/Brother-HL2240D-Monochrome-Printer/dp/B004A16L2Q/ref=sr_1_1?ie=UTF8&qid=1413392871&sr=8-1&keywords=brother+hl+2240d
Xerox Phaser 6500DN ($350-$400) Color double-sided laser printer. (Standard US Letter 8.5X11)
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