http://sfbay.craigslist.org/sfc/cto/2014945660.html
They say it does not vibrate or flex. Must not be a ferrari spider as the ones I have been in and even my 355 gts flexed when going over drains.
I'm pretty sure this is the same car that was on the market when i was diggin, there was a damage report on it 3 years ago via carfax IIRC. It was for sale for a very long while, but this seems to be a different seller, but same car. Not too many black 355 B's in Portland.
Some would say that is the car being "communicative". Jeremy Clarkson refers to this trait on the 355 as "..not only knowing that you ran over a squirrel but also what it had for lunch". Good thing it was a B...b/c it didn't flex.