Okay, now you're speaking my language. I paid way too much for mine, but, it was before I knew anything about the car, and I WANTED IT. I paid just under 9,000.00 USD for a 92 LSL (fully loaded) with 109K, two years ago. We can buy a decent '92 here for around 6,000.00 USD. I really wanted to fly to Texas and get a 94 with 58,000 miles for just under 10,000.00 USD, but, it doesn't look like that's gonna happen.
Since cars are a bit more expensive in OZ, if he's asking 15, offer 10 and hope he'll take 12, or, offer 10 and a keg of Fosters and promise not to sneak back to his house and put a Boomslang in his bed.