That's older than 1997, 97's were 820 "Mountain Track", the Antelopes were older. 1996 possibly? It appears to be in excellent condition but $175 seems a bit high for an 820 of that vintage but then I'm a cheapskate. My wife and I bought 820's new in '97 and still have them although I have upgraded them several times over the years. Personally I think an 820 would make a great commuter, I've put a lot of miles on mine. Except for a different saddle and a Blackburn rear rack here's the wife's in it's latest configuration.
The original parts are still going strong on another bike.