Since you have a "backup" Carrera, sharing your SC with another owner is OK!
It is just astonishing what they are selling for. I saw a 84 Carrera sell for 81K and a 86 sell for 101K recently. I called my insurance agent and asked him to raise my agreed valuation up another 20K.
How many other toys can a guy buy that quadruple in value, as the most fun a man can have with clothes on, and are a joy to own. I still smile when I see it in the garage just walking into the house.