Our buyback takes place at the end of each semester and the third day into each semester. We will also buy back any books that TRI sold to you provided that there is minimal highlighting and writing and all pages are intact. Most books we sell at the beginning of the semester are bought back at the end of the semester as long as the colleges are still using that book the following semester. We do buyback access codes if unused. We also buy back at the beginning of the semester, if our stock becomes low. This usually occurs around the third day of school.