Anomalies in Physics Publishing
Several decades ago, as a physics undergrad, I bought Sears and Zemansky's University Physics for $9.95 (the price was on the inside of the front cover). It was already a third edition at that point. The current 14th edition has acquired new authors and lists for 309.80, and for another couple of c-notes you can get the solutions manual and some other aid. I'm going to guess that mechanics, thermodynamics, electricity, and optics haven't changed that much, but the book has fattened up to 1600 pages. What a ripoff, but you can get slightly older editions for less than my price for edition 3.
Meanwhile, on the other side of the planet, I found a beautifully bound and printed copy of an 700 plus page advanced textbook/monograph for less than $25 bucks - including shipping from New Delhi, India. Published in the US, printed in the UK, it somehow made its way to India and back (via Germany, and Ohio) to Las Crucesfor a dirt cheap price.