jdmonkey wrote:+1 about no need to spend even close to 2k on books. Also while many of the used books are highlighted, my experience is that many of these books have more sentences than not highlighted, so you can completely ignore the previous highlighting by using a darker colour. You also might get lucky and find competent notes of key points next to the cases in the case books by the previous students.
That really boils down to personal preference. I just like to have a clean slate to work with, and I have difficulty trusting what someone I don't know has done in terms of highlighting / note taking. Just be careful with getting used books online because I've seen some pretty horrendous highlighting jobs (one of my friends had one where literally everything on every page was underlined in black).