How much money do you put into a car?

Heres the way I roll....

Bought a 72 Harley Sportster in crates for $600...spent a winter putting it together and a few $$ on parts at the swap meets. Traded the Harley for a 64 Belvedere...pulled the drivetrain and installed a 440 I built myself. Traded that for a 67 GTX that needed an engine rebuild and paint job. Sold the 6pak intake and carbs that came on it for $800 and rebuilt the motor, and paid a buddy $400 to paint it and I bought the paint. Total investment to date, not including wear parts and the rims... about $3500!!

How much do I spend on cars?? As much as I need to but as little as I have to!!! Geof