Well, with the new trading system added to the game, I decided it was time to update the trade calculator I wrote a while back. My new trade calculator can be found at [link invalid - removed] and now supports the trading of Resources, Buildings, Buffs, Decorations and most other trade-able items.
Because the economies are different based on which server you are playing, the calculator allows you to choose which server you want the values for. Right now, I am supporting Zeus and Aries, but I will be adding servers for other countries and languages as soon as I can get accounts created on those servers and my level high enough to have a trade office to see trades and collect data.
The trade values are updated twice per day.
UPDATE 1: I am now supporting most of the game servers. Simply select your server from the drop-down at the top of the form.
UPDATE 2: I have added a ticker that shows current prices in gold coins for most items on a server at the top of the results window.
Zeus Server:
[link invalid - removed]
Aries Server:
[link invalid - removed]
Hope this helps.
-Draxxon