hmmm both the paint jobs are pretty sheap, they tried to paint a little bit inside the engine bay of both cars to make it look better but i looks pretty bad...
The orange one has a longer rego, is mechanically standard, but has a full aftermarket bodykit which is quite hard to find for a sedan, but this is a 1989 model with 117k kms
The green one however has aftermarket exhaust, wheels, filter etc, still has a bosy kit but is a newer 1990 model (this one has the type m velour seats) and only 107k kms on it but rego expires in October.
In my opinion I would try for the orange one, even though it may be a year older with a few more ks a standard car will let you do it your way in the way of mods (like my car was standard when i got it ) and is less likely to have mechanical failures as its standard, plus having the full BN kit fitted is a bonus, and when it does come time that you do start to modify having standard parts to clear a defect will be very helpful....otherwise you will have to borrow or worst case spend more money and buy standard parts'
Also to note he said he wont bidge on the price, whether you can get either car down to $9k is another thing
But go down see if he will take u for a spin and see how they go, if the make funny noises etc (what ever you do when your buying a car) and then make a decision, but in the end its up to you