I donāt think itās expensive at all, but it all just depends on what you do with it. I make a living writing code, and I write a GREAT deal of that code in ST2. So when I compare my salary in a given year versus how much it costs to own Sublime Text, itās a no-brainer.
Now if you donāt have a job and you just tinker with code, or write stuff for free, then I can see how it would be expensive to you. If this is the case, and youāre good at it - why not earn some money doing it? There are plenty of sites where you can bid on a job (PHP, Javascript, Ruby, etc, etc), complete the job, then get paid. 
Also, be sure to think about this from the developerās perspective. One person wrote the app (correct me if Iām wrong community). If he has sold 5,000 copies for $60 bucks (I have no idea how many have been sold) then heās made $300,000 in sales. That doesnāt mean heās made $300k though. I canāt speak for the developer, but I pay taxes that would cut that number down significantly. Then thereās healthcare costs, medicare, 401k (and other retirement funds) to think of. Also, donāt forget that heās been working on this for years - he may not have made anywhere near that amount of money. Iād be willing to bet that the developer doesnāt get paid much at all when all is said and done.
Last thing to keep in mind is that you can use the free version indefinitely. You just have to put up with the popup. Thatās a small price to pay (no price at all) for a great app. 