I was able to get Prime as a student (taking graduate classes through a university) for half off. This is my second year of getting it 50% off, the year before that I got it free somehow. It is well worth it at $40. One thing that makes it worth it that I don't have to order $25 worth of stuff to get free shipping. Sometimes they have great deals on little things, less that $10, in the past I would either pay for shipping or find $15 of other stuff that I "needed" (which I didn't really need). So, now I can order what ever I want.
I also like the free book a month, but I don't always get that. Prime movies aren't that great, I usually end up paying for movies, so I am not sure I would get it just for that. I am actually thinking about going back to Netflix for movies/TV.