Textbooks and Renting?

[Tupacalypse]

Hey GA/IR peeps,

 

I will be starting my MA in the fall, and was wondering if any of you have any input about textbooks.  Specifically - when you buy a textbook for a class, do you keep it to always have in your personal library, in case you need to reference it in the future, or do you sell it back?  I'm debating right now on if I should buy or rent my textbooks.  I know in undergrad this was a different story as often textbooks were something I wasn't interested in career-wise.  But are things different for your MA?