There is a reason most of these horses are in a 2 year old in training sale.
They do not have very good pedigrees. If they had good pedigrees, some real buyer would have outbid a pinhooker at the yearling sale.
There are a lot of horses with unraced mares, sprinter mares, or ugly pedigrees.
If you really look at it, the idea of buying yearlings becomes even more attractive.
Buying A Race Horse 