since prices have gone down, most colleges now offer free printing up to a certain amount. normally a huge amount 60-100 pages a quarter, and most of the time extra prints from the library cost 5-10c per page. a 2 dollar assignment would have to be a 40page paper, and you'd probably do those once in a lifetime.
not having a printer in college is more manageable than you think. all in all, 50 dollars plus 60-70 dollar toner is not better than free.99
source: me and all my college friends without printers.