This happens with every big new morph. They start out very expensive, then take a big dive. The reason they are so expensive to begin with is because they are rare. Once people start breeding them more, and they become more available, the price goes down.
This has nothing to do with who is elected president or how much money people are making. It is simply supply and Demand.
10 years ago a pinstripe was over a few thousand dollars. Now you can easily find one for 300 and under.
Once the price has plateaued you can start adjusting the price based on gender, age/weight, and the quality of the morph.