i'd assume u mean eg9 to mean the model literally. there are a few models of the civic from the eg series and they come in different specs and i shall restrict my comments to the eg9 itself.
my honest opinion is that the car would have been "modded" until like crazy already. it is not difficult for the previous owner to "unmod" his car prior to selling it. lots of 2nd hand parts from the car still very much in demand.
car has decent engine (160 hps stock), relatively light (juz over a ton) and reasonably fuel efficient (when driven with a light foot). interiorwise, can only seat 4 adults (rear has a center rest that forbids all but the gay to enjoy sitting on it). excellent handling coming from the all round double wishbone suspension setup (similar to F1).
in the end, ur main consideration should be how much of these original selling points does this car still have? an old car like that should have seen better days and u would not want to spend on repairing/ replacing the worn bits of the car.
my advice is to grab a fren who has a keen eye and some relevant experience with the eg civics and bring him along for a test drive. it is easy to tell if the engine is in good condition with a trained ear and a sensitive butt.
he should also be able to tell you if the suspension parts are worn by listening to any sounds that may be produced while driving the car.
But i trust honda more .Asking all of advice ..
I am more afraid of the condtion of the engine above anything else.....
Oh ya try to take out the passenger side mat..... just in case only..... but i dun think so...... that it is perviously a L plate learners car..... the idiot teach in the morning and go racing at night..... 
Is better not to get a problem car ..If not i sure 