Also, by selling the junk loot to the vendors you will get a plus of a few thousands aion kina, good enough to cover the costs of your next travels or consumables.
As I said, this aion gold guide has shown me many aspects of Kinah making in Aion Online, including a few advanced methods for high levels.
So, if your vaults are empty, or if you're wandering around only with a couple of thousands in your cube, not knowing what to do to earn the aion kina you need for the equipment, materials, consumables, wings or whatever is very expensive, I strongly recommend this aion gold guide