It's a high price because a buyer will get a immediate pay-off. If it were recessive, the buyer would have to either buy both sexes, or wait addition seasons to breed hets, grow hets and breed them back in order to get the morph.
So anything that makes things happen faster = higher price. Same as buying an adult morph vs a hatchling morph. You pay more for a decrease in the total time for 'payout' or producing your own morph babies.
Conversely, a recessive morph cost the originating person a lot more to create, so their prices can also be high.
Reply With Quote