I met a Berkeley student who paid $17 (including shipping) for Statistics (4th edition = latest edition) by Friedman, Pisani and Purves at abebooks.com. She got an edition meant for India, but the text is the same. The current lowest price at abebooks is $37 (including shipping). Amazon charges $108 (including shipping). More Dave Lull points out it is even less ($25) elsewhere.
See also this open-source textbook project:
https://openstaxcollege.org/books
I played that game in grad school and literally handed in a combinatorics problem set for the next chapter. I had no idea that the India edition skipped a chapter.
Caveat emptor