Yes, this is a nice debate over the value of items, and selling price of items represented in platinum. Basically if you look at the different maturity levels of each server, you will realize that all of them have different valuations over items and even for their "own" currency, the platinum on that particular server.
But yes, you can say that until a healthy amount of the playerbase dont gather a lot of plat, items of great value, however great items they might be, will be sold for little money.
Cogdoc