“Concept cars come to market approximately 0% of the time.”

Depends, we really enjoyed our Isuzu Vehicross:

https://farm1.static.flickr.com/97/229602594_94651a28a3_b.jp...

Anyone could buy, they were not hard to come by, despite incredibly limited runs, a thousand a year for a model, tops, some models as low as 50:

https://en.m.wikipedia.org/wiki/Isuzu_VehiCROSS#Production_d...

Very tough, well built, you can still see them on the road.