When it is time to sell.

I got a 64 Dart out of the garage this weekend that I wasn't using and sold it, but then I got my 65 Barracuda out to drive around which is fully licensed and insured as a regular car, not an antique. I am not feeling the love for it. My first car was a 65 Barracuda 6 cylinder and this is a V-8. It handles like an old truck to me. Since I am contemplating a move, should I consider selling this one too to lighten up the load? I do have a 65 Signet that I am keeping. Besides lack of use, when is it time to sell in your opinions???