Stifler:
This is a nice topic I have ever read and why you are asking this question? Why should not be asking here in Sajha forum? 

Yes; We used to buy used book from school's book store, and in university town there was another book store where we can buy and sell text book .
Online there are many sites we can buy textbooks, textbooks.com , halfprice.com and so on. As Riten said, we copied on large sheet where we were able to copy two page in one sheet .

Sometimes pople sell on ebay and local craigslist too.