Update: For the heck of it I looked the Nishiki up on Sitemash. That Continental does not have a triple chainwheel, or cantilever brakes. The Shimano 600 crank and 105 deraileurs sound nice. It's a 58CM (23") frame, so you need to be roughly in the 5'10" to 6'1" range and stand over it and have 1" clearance off the ground when you lift it up to where the top tube gets blocked by your body. Wheels are true but worn means check for "hops". I know the 1983 model was a full-blown touring model, so my best guess is that this bike is older, or has had many parts changed on it. My instincts say it has some wear on it, but the guy is reasonable asking $80 (Canadian?) OBO. You therefore might want to be cautious and look it over with a mind to politely "walking" if you don't like it. There is another Nishiki Continental in Canada that showed up for $395 that looks to have been bought and "stuck up on the wall" like a picture. Something that was bought and hung in a safe place on the wall as artwork is your very best bet in a used bike, but "used but not abused" is a good "rule of thumb".