I looked into getting a 308 about 5 years ago. I had found a '83 with 29K miles at the local Ferrari dealer and they were asking around $33k. So I did a lot of research and decided against the purchase, and here is why...
First of all, performance is not good at all by current standards. 0-60 is around 8.5 seconds. That was fast back then, but today that is no faster than a base model RSX. Handling is decent, but again, not up to current standards. The car came with 14" wheels and did not have low profile tires. So obviously this is a car for image and not for performance.
And then there is maintanance. Oil changes are around $150 and you need one every 2500 miles. And here is the bad part -- you need a tune-up every 15k miles. The tune-up on this car requires a partial rebuild and costs $3500.
Also, I read they are not the most reliable cars.
So unless you are just looking for a cool looking car to go cruising with occasionally, I would recommend against it. It doesn't perform well, and due to the high maintanance costs, you can't drive it often.
I hope this helps.