On buying a used FFR, there is a big difference between buying a car that was built using a "donor" and one that was built using all new parts. Be clear on what you're getting before you plunk down any cash.
In terms of the body shape, FFR has the so-called "perky butt" relative to other manufacturers. Some like it, some don't. ERA has profiles of several cars you can look at to compare their shapes:
http://www.erareplicas.com/427/profiles/index.htm
DD