Looking to buy a 90 integra on air

What should I be looking for when I go see this car sunday? What kind of problems should I be looking for? The guy got the air ride setup from AIM about 2 years ago and it has a "valve block". What the hell is that?

Josh

the valve block is just a block about 2 times the size of a switchbox with all the valves on it.

those valves suck, had them on my truck,they stick alot and i had to fu*k with them all the time