Have u used the storage yet? There's a Storage Merchant where you have another 2 pages worth of space, and that storage is common for all 4 of ur characters... so if u put 50 dust in storage with ur mage, when u log into ur fighter u'll see the 50 dust there, where u can take out and use for production or w/e....
http://www.fiestafan.com/wiki/Roumen
The NPC with they key on the map...