The way i look at it at this present time. The good ones on the road are only going to get better as they are owned by enthusiasts who strive for perfection. Then the bad ones will only get worse as they get neglected.

This will be reflected in the price where good ones will continuously inscrease in value and the bad ones will slowly dissappear.

My old almera gti was worth nothing. Even though there are less than 500 on the road in the UK. A mint one goes for about £2k. its all about what the masses perceive as desirable.
Sierra cosworths can still be had cheap but it'd be a dog. Expect to pay £8k plus for a good sapphire.

I think Patrickstar has it spot on. Price them high IF you want to sell (and why would you?)

The effort and work that's gone and going into mine alone will make it worth the high value it would take for Someone to persuade me to hand over the keys.

The problem is we want resale values high but parts cheap.
I used to be into nissan 200sx. There was a time when I could pick them up for peanuts. Then drifting became popular and prices trippled!
Knackered project cars are going for what I could get a mint one for.
Drift tax is mega high on parts too.

The profile of the coupe needs raising imo