Buyback is during the week of finals each Fall and Spring semester. Summer buyback is the day of finals at the end of the second summer session. You may contact the bookstore at the above phone number for exact days and times.
Books are returnable for full credit (depending on condition) within two weeks from the first day the school is open for classes (i.e. if classes start on the 22nd you have through the 29th to return books. If your class starts on the 23rd, you have until the 29th.)