Supply and demand
This, quick and simple answer.

Our hobby is quiet unique, morphs can make and break price; years ago Enchi's were being sold for 1/4-1/2 of what they are going for now berfore they were found to make some crazy stuff when combined with other morphs.

Deserts and Caramels were quiet expensive until there was said to be some breeding issues. fires and Het Russo were worth more until other combos were found to make a white snake.

The day a Pastel is found to be the only morph to unlock a hidden gene in another morph their price will go up too; because everyone will want to have the next best thing. we like answering questions here.