Oh no! You have walked into the slavering fangs of a lurking grue!
Just like everything else, it is all about supply and demand. While I LOVE PWV20, it is an expensive bourbon. This price will thus keep the demand down. Most of us probably have one bottle, but there probably are not many who can afford to bunker this one particular bourbon. (although I would like too! )
I'm sure that if Julian has trouble distributing this year's bottling, the price will indeed come down a little bit, but I wouldn't bet on it.