Steel
Price 3.5-4.5
Local bonus would probably be fort defense +10-20%
Leader bonus I'd say +15-20% shock damage or +5% discipline

Rum
Price = 3
Local bonus = Unrest -0.5 or -1
Leader bonus = Privateer efficiency +33%

Extended timeline version?

marble, olives, citrics (S Europe)
gunpowder, paper (China)
patatos, corn (America)

Could you make it so lumber deplete like gold? Simulating deforestation in highly developed provinces.

I second that olive oil should be represented in the game.

It was a pretty big deal for the Romans as well as all the different trade republics in the middle ages and renaissance.

Produced in mediterranean Spain, Italy, Greece and maybe some coastal counties in the Levant.

Trade value should be comparable to Wine.
Province bonus maybe increased trade value
Leader bonus increased trade efficiency? Or increased trade steering?
Haven't played in too long to suggest proper mechanics for it.

maybe amber ?

Rum Added
Olive Oil Added

extended timeline version please!

did You thinked about add some tradegoods from Change Tradegoods:
- bronze/steel (artillery)
- munitions (weapon, perhaps exclusive weapon - also white)
- marble
- luxuary goods - in SE we had furniture (Danzig)
- silver

could You aslo thinked about changing goods (from iron to ex. artillery?)

Amber added

The bronze/brass/steel/munitions/ammunition/artillery branch of goods that are in several mods could, I think, be collapsed into a few goods, basically, steel and munitions. Places like Toledo in Spain and Damascus in Syria were famous for producing these, and later in the period, much of England and the Ural Region of Russia became significant producers.

Silver really needs to be its own trade good. The vast majority of the 'gold' provinces in Europe should be silver.

Marble would be a nice addition, as would fruit.

marble added

how about tropican fruit?
or gunpowder.

perfume(Europe)