Try buying your books online.
www.abebooks.com has worked for me over the last 2 years. A text book worth about 100 to 150, I got for 8 bux (paper back). Usually arrives in under 2 weeks, especially when if you buy it from Malaysia.
You save big, although once your done, not many ppl will wanna buy an international ed. So u will be stuck with the books.
Intl ed is no different from North American ed, although I did have ONE book where the units of some of the questions in the back were different other than that it's the exact same as the local ed (it's very rare).
If its custom courseware for the class, then you will HAVE to buy it from the book store