Staples currently has a mono-chrome (black and white only) Brother laser printer which also does two-sided printing on sale for $79.95 ...
http://www.staples.ca/ENG/Catalog/ca...fixedcode =WW ... I just bought one today and IMO its perfect for students.
There are also two toners available for it ... One is approx $50 and the other is approx $75 which prints for more pages.