i just bought a 79' 308 2 weeks ago. my first ferrari. and so far from what i can see and what i have read in to the 308's and 328's are good buys. if you buy a carbed car you can do alot of the work yourself and i guess once you get into the fuel injected cars it gets a bit more dicey. the market for a nice example 308 is in the high 20's to mid 30's. if you work a dealer over you can get one for the mid 20's. i guess the best thing i can say is do research,research, and more research. do your homework and figure out what you are comfortable with spending on parts and service. and no matter what you buy you will be happy with it. how could you not be? its a ferrari.
here is what 26 grand got us.

here is what 26 grand got us.