I’d have to disagree. It’s roughly the price of a normal technical book, certainly affordable. Considering the amount of time we spend in text editors, the price is ok (I personally regard it as an investment in continued development of ST).
I still use vim or emacs for some tasks, and I was so far unable to use anything other than Eclipse/Netbeans/IntelliJ for nontrivial java applications (and even trivial ones get annoying pretty fast), but especially for dynamic languages like Clojure, CoffeeScript or Ruby I prefer the lightweight-ness of editors like Sublime (without actually sacrificing power!).