What can be traded in the ITU?

It is also possible to trade things you could not trade in Illyriad in the Trade Union. I have some ideas now like information, diplomatic or military operations, magic, credits and good settlement locations.

All this things should be traded in the parent-trade-folder! What else can be traded in the world of Illyriad?

If you have other ideas how we could use this trade platform (e.g. negotiate long term trade contracts), you can also post it here.