I agree on PH1's.
Whatever current classic's you look at it's always the original models (As the designer intended) that's the sought after one.
As cars move into the 'classic' arena it is nearly always the case that those that look the oldest, that look classic. That have the value.
See 911, See Golf, See E-type, See Escort. See Spider (105/115).
Phase 1 GTV's with good original paint and all the textured black lower trim look 'old' already, they will be the first to increase.
The value of later models will follow as supply of the earlier models diminishes / cost to obtain rises
See also 911, E-type, Golf, Escort, Spider (105/115)
It wouldn't surprise me to see people 'back dating' P2 and P3. With P1 parts and black underline. ( to me the black underline is the way Pininfarina sent it out, it works wonders to chop down the profile volume of the body and make the car look low, long and slim enhancing the muscular tumble home from both 3/4 views.)
I have only ever stuck to Ph1 GTV's because to me the Ph2 is a rough attempt to modernise a car that was not necessarily 'timeless' but classically 'of a time'
It's like those version of the original star wars trilogy with the updated cgi.
Just give me the movie as it was in the 70's with stop motion.