One of those decisions

i have the choice to buy a 1990 Mazda L626. . .something for $800 or one of the newest laptops from gateway- an AMD 3400+, 1G DDR, 64bit, DVD/CD Burner!! for 4 payments of $239/ month. I can pay off either one before schools starts. The computer would be more useful during the semester especially w/ engineering, but the car would be good to have now. The car would come from a private seller, so i would have to go back to Omaha and get the license plates and insurance before i can drive the car, :( the computer would be shipped right to me, much more convenient :) Seems like i know what the better choice would be. . . . so why is this such a hard decision for me?. . . . a car gives me a lot more freedom!!!!