1987 buick grand national the guy says it has 45000 miles i looked at the car and it has been outside in houston tx. car has not been inspected since 1998 the car has problems mechanically it does not boost drives like a normall 6. leaking transmission oil. exterior is 6 of 10 interior is 7 of 10. but everything looks bone stock is their something minute that will make this car not oprate properly as in turbo? every thing seemed to be in tact, but the boost gauge on the car was all the way up. What would you experienced guys give for this car. This guy wants 5000. Now is it worth it? The title on the car has excempt on the miliage, what does that mean? Feed back would be greatly appreciated.