You could get a good chair for way way less though. Matter of fact I'm sitting on a $30 couch right now. Which is probably what that chair of yours is worth after you buy it. What made you spend the other $170? Perhaps it gave you a good feeling? Maybe the picture did the same...
Humanity in general need these things: food, shelter & love / societal interactions.
So much money is spent on things outside these necessities that I would argue for a particular person it's much more valuable than a chair. Buying "love" even temporarily might be better for the psyche than buying that new flatscreen that is just slightly improved than the old flatscreen.