books are so freaking expensive!

My physics-y book: 40 that I got from a guy in my TRAD class. It would've cost 120.
My German-y books: like 100 altogether for the 5 of them. Lots of reading, ugh. Oh well.
Math book number 1: 33 bucks, used
Math book number 2 and solutions manual: 68, used, with trade discount
Heat Engineering book: 180, with appendix
Circuits book: 130, new

Total: like 560, which is like 25% the cost of tuition for one semester. Geesh. Had I got everything full price, I'd've spent like 720.