We find the 2 lira payment on merchant encounter (meeting another already existing merchant on a tile) is hardly a deterrent.
We are now thinking of increasing the payment to 5 lira. Hopefully this would improve the game and influence a lot of tactics in the game. Any thoughts?
Why should it be "deterrent"?
Merchant love to trade - they do not want to be deterrent (otherwise they make no business).
From a gaming point of view:
The idea behind is not to block out others completely - this could kick others completely out of the game. This is not intended.
It's just intended to make that move a little harder.
And by the way: If A gives B 2 lira A now has 4 lira more compared to B. That's nearly as good a the 5 lira action card...
From my games: Recently I was delayed 2 rounds from finishing the game by this rule. Due to this I only finished 3rd instead of 1st...
Conclusion: Absolutelgy no need to change this rule.