Overprice wine?

Had an impulse buying AGAIN. I think I MUST stop such activity.
I bought a bottle of 1999 wine @ AU$100. It tastes good but at 100bucks; it is kind of steep.
Anyway, it was suppose to be made from grapes that were planted since 1963.
So, we bought a total of 19 bottles of wine in this "winery trip".