My favorite was also my first car, a 1970 Fiat Sport Spider 850 bought in 1972. I bought it for $250 after its former owner had rolled it and left it top down in a parking lot for a little over a year. Needless to say, it needed a new top and a new floor, and some bodywork - if I recall correctly the work cost me $500, but it was the best car I ever had as far as economy of operation.
Gearing down on the exit ramp from the 401 highway, it sounded like a real race car!
I would fill it up in Toronto and drive it to Brockville, the round trip costing me just about $5. Just the perfect car for a 20 year old kid to have. It was truly a chick magnet

About a year and a half later, I traded it in on a used '73 LeMans Blue with white roof, same as the cop car in Smokey and the Bandit 1), and got $2000 for it - enough to pay for it, its insurance, repairs and all the gas I had ever used in it, still leaving money for the new car. Still, I wish I had kept it.
I loved that car!
Funny thing is the next car I owned after the blue/white Lemans which replaced it was a '76 beige LeMans, oddly, but not intentionally, identical to the cop car in Bandit 2!) When I bought both of the LeMans's, I hadn't even seen the movies!
Dave