There are definitely youngsters with not much training, that are worth over 100,000 as is and sell for that these days.
Just because a horse is advertised for over 100,000 doesn’t mean it ever sells for that. It might be a sort of reverse psychology, put on a high price so the buyer feels real clever and like he got a ‘deal’ when he gets him for 50 or 60…the seller says…oh my god, you ride him so well that i HAVE to sell him to you…LOL.
There are also a lot of horses that are overpriced because they are being deliberately misrepresented as much better than they are…I was shown several in the 60-75,000 range that were very clearly not worth it, just because they had very average gaits and conformation, there were others that had a really defective canter or conformation defects or health problems that were really serious. Some problems seem worse to some people than others. For example, the 7 yr old grey with the drop-dead-unbelievable gaits and saintly temperament, my friend wouldn’t buy because ‘he might get melanoma’…some of it is more substantive and clear cut.