Just remember the chassis has 200,000 miles on it, even if the engine doesn't. Other, probably minor, things will eventually start to give out.

For instance, both of my cars have non-working windshield sprayers. I have to carry a bottle of water to wash the window. Not a big hassle.
Both cars have the heat/air come only out the bottom. Dash vents don't blow at all. Not a big hassle.
Neither car has A/C working, no mention of that on your Honda, or whether you care.

Also, who did the engine swap? And how long ago; as in, have any kinks been worked out, or will you have a nightmare on your hands if you have to figure out how he rigged it to work? If they've driven it, say, 10,000 miles already, it's probably fine. If they just swapped the engine and are selling it, I'd stay away.

I'd rather have a 150,000 mile original engine, than a 90,000 mile swapped motor of unknown origin. How would you even know the true mileage on the motor?