Good luck. Didn't you say your dad had a 3800 with 310,000 miles?? In your family you probably have the highest and lowest mileage 3800s of their time!
A couple months back I saw a '92 Olds 88 for sale, so my dad and I went to check it out. It had 38,000 miles on it. It was driven by an old lady to church on sundays then to the gas station every couple months and that is it. She sold it in 2000 to the people who were selling it a couple months ago, and it only had 16,000 on it when they got it. Talk about low miles. The car still had the original tires on it. It looked like a brand new car. If I would've had an extra $4,000, I would've bought it.