I tried to do this once when I was really young, probably 15. I tried to get a 70's Mercedes for my father for Fathers Day. Sadly I didn't have the funds. Later on at 22 I redeemed myself in my own eyes and bought him a Cadillac! Finally! The reaction you get for something like this can be just plain memorable.

This guys Mom used to clean houses back in the 70's and a client used to let her move his car and she fell IN LOVE with it. It's not a sports car either... It's a 1973 Saab 99 EMS!