I am currently looking at a 1986 Ford F-250 4X4 Lariat. This would be my first veichle. It has a 6.9 diesel engine with 140,000 KM or 86,940 miles. I spoke to the owner and he said the heads were replaced at the 120,000 (74,520 miles) mark. What does that mean. He also told me that he's changed the oil every 3,000 miles and he adds a engine additive. He also mentioned the front yoke seal is not good. He told me he gets an average 20 MPG. Also this truck is showing it's age, it's rusting around the wheel wells and there's a small spot on the driver's door. He told me he's been watching those spots and he said they were there since he got the truck 5 years ago, and they haven't changed since. I'm a bit weary to take his word since he's trying to make a buck off of me. The lowest I could get him down to is $3,200 (Canadian). Is this a steal or am I being taken for a ride? He said that he could take the engine out and sell it on it's own for $4,000 easy. He also told me that the rims were worth at least $1,000. But it's the rust that really concerns me.