the vx's engine turns 1/3 slower (2k rpm crusing speed insted of 3k) so things like the rings and valve guides should last longer, so far I haven't heard of anyone with a vx that has low compression, so that would give me the feeling that the engines are lasting alot longer then the crx hf's did.
in my expearince the most damageing thing to a civic vx is a teenager, they will swap out exaust, and engines, and add headers, they will destroy a car more then rust.
the timing belts have to be replaced every 90,000 miles or by the time you hit 120,000 miles you will have an engine that is scrap metal, your o2 sensor will most likely need to be replaced every 15 years costing up to $300, they rust out around the rear quarter panals, but that doesn't sound like an issue on the one you are looking at, I've has to replace my tranny after 220,000 miles because it had a loud main bearing, but you could hear that grinding sound with the car in neutral
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