A bottle of 40 is around 150€ here. With age, the difference gets biggerNah. The real Port (not that fake western American we make it like Port so we call it Port crap) is not terribly expensive. A bottle of 40 is roughly 250 to 300, but I have a hard time finding it even when I can afford the good stuff.
Not only the age counts but also the year... An 50 years old, from 1962 is around the 295€ and from 1960 goes up to 350€.
One of this days I have to take a more careful look at my fathers cellar. I might be rich and not even know it