The car i am looking at is a 2003 Mustang GT. It has 63000 miles, leather, mach stereo and is an automatic. THe car is in good running condition. The only real problems are, there is a good size crack in the windshield, and it desperately needs new tires. I have researched and its gona cost approx. 2oo for the windshield and no more than 500 for tires. What should my opening offer be if the seller (private seller) is asking 9000? Im looking to pay no more than 8600 or 8700.