Well send you this much stuff per month, and you send us this much.
I notice you have plenty of Oil, Fruit, Uranium, Ivory and Wine. We'd love some of that. And also, if you can spare some, Cattle, Horses, and Gems.
You in turn may be interested in part of our array of metals, especially Iron and Tin, some Natural Gas or Water Power for that greener options, maybe a bit more Farm Produce or Wood for those more medieval Counties, and, failing that, we have plenty of spare Gold.
Oh, and Camels, if you don't want Babkhan ones