I’ve found these gems on Amazon for next to nothing.
By: Samuel Kamin
This one cost me about 2 bucks
Essentials Programming Languages, 2nd-Edition
By: Daniel P. Friedman, Mitchell Wand, Christopher T. Haynes
I grab great condition hard cover for about $10
All in all, not a bad purchase for $12, sadly I can’t say the same for books I was force to buy while in college.