Merchant

The Harbor or The Wayward Lobster
Male Merchant going through customs on the docks leading to Lighthouse Island:
 * Merchant: That tariff rate is outrageous! I'm just shipping turnips, not some Cannith-made automaton!

Male and Female Merchants near Hazadill's and Cartamon's Shipping Warehouses (before or after completing Hiding in Plain Sight):
 * Merchant: Hazadill's fees are cheaper, but Cartamon offers extra security if I use his warehouse.
 * Merchant: Cartamon's warehousing fees are preposterous!

Merchants without unique dialogue say the following things:
 * Merchant: I have to admit, even with the Coin Lords' heavy tariffs, I'm making hand over fist trading in Stormreach.
 * Merchant: The Last War left cities all over Khorvaire in ruins. But Stormreach is on the continent of Xen'drik - making it the wealthiest civilized trading city.
 * Merchant: A copperless man can make a great wealth for himself here in Stormreach - if you're daring enough.
 * Merchant: The Coin Lords set outrageous tariffs on anything coming or going from Stormreach!
 * Merchant: Stormreach is the only open trading city between Khorvaire and Sarlona. Every ship stops here - I guess that's why Stormreach is so rich.
 * Merchant: I don't have work for you. But check around, there's plenty of work to be done in Stormreach.
 * Merchant: I hear there's a real kobold infestation problem in the Northern Harbor. That's why all the traders use the Southern Harbor now.
 * Merchant: I need to get my goods to the Marketplace! Khyber, why won't these Free Agent workers move faster!
 * Merchant: My navigator tells me there's another trading city on Xen'drik, called Dar Qat. It'll only let in Sarlona traders, so it's no use to me.