The falcon F7 there was definitely more than one belt you can still buy it brand new for $195,000
The Ferrari P330/4 What is the purpose built race car that there were a couple dozen made that now sell for millions of dollars that particular one in the video is a kit car
The Pantera there was many many of those build and they are fairly easy to find in auto trader
The V8 vantage Le Mans is rare but still 40 made not 1
The P4/5 is actually a one off car but it’s not a Ferrari it was re-designed.
The Ferrari super America 45 there was 599 of those.
The infinity essence was a concept car so of course that’s a one off but if you want to count concept cars there’s a whole lot you missed lol
Maybe do some research next time before posting a video saying something as fact.