I have that bike, with 51,000 on it. Runs like a top. lots of parts on eBay, and Honda used the same parts across multiple models and years, so there's not much in the way of parts that will prevent your bike from being repaired, should the need arise.
Some fuel system cleaner will work wonders in these carbs. I like Seafoam and Berryman's B-12 chemtool.
The carbs on this bike are a bit more of a bear to work on than on other bikes because the airbox is part of the frame. The carbs are well wedged between the cylinders, but I've had the carbs off a few times and it just takes some patience.
It's a good bike! Buy the official Honda Service manual (they come available on eBay frequently) and don't waste your time and money with a Clymer or Haynes manual.
Do all of the maintenance to the bike when you get it. Assume the previous owner did nothing on it in years, no matter what they tell you.
If you have the opportunity to check/ride the bike before buying it, pull the right side cover and put a volt meter on the battery. Start the engine and check the voltage. Rev the engine to about 3,000 RPM, and check the voltage again. If you don't have over 13.5 volts when revved up, know that you have some work ahead of you, and get the seller to drop the price a few hundred. (This model seems to mask charging issues as carb issues, so that's why I suggest it.)
Currently Running Stable:
2010 Honda NT700V
1986 Shadow 700
1986 Honda Trail 110 (Postie Bike)
1987 Honda Rebel 450
1973 Honda Mini Trail 50