they cost money because lots of them look sad.
A good one is hard to find. There are many factors but most desirable factors are in rare gene combination, thus you have to breed many bad flowerhorns to get a few good ones. And all that time you have to feed them and take care of them.
Then, often, you have to ship them to the united states from thailand
which also costs money.
I'm assuming you don't have a very nice flowerhorn if you think it is sad.
Sadly, often a bad looking flowerhorn will be worth less because it is a hybrid, and theres no telling whether it will look good or worse in the future. With a pure species you have a standard life history and you know what kind of future they can attain to some degree.
that is why flowerhorns vary so much in price.
but it is kind of a small question....
I hope you don't think of it as a 'craze' or 'fad' instead of a kind of cichlid-