It is amazing how different people value bulls. Some try to save on buying bulls but loose in the market. We sell all our bulls at home, and are having good success.
We don't over price them but do price them fairly. Sell 80% of our bulls to repeat buyers or referals.
As for the size of cattle, their does seem to down sizing, however they have to watch that the calves have length at birth to still calve easily.
We sell semen here for a major company and they do try to have the cattle moderate and thick at yearling age. Here we don't chase fads but try to be middle of the road and then we are right more often than not.
It may not be what some like, but to chase fads your are always three years behind.