trading centre?

I'm sure this might sound silly, but I'm working my way through the messenger course, and can't figure out where exactly I'm supposed to deliver the commodities? "remember" tells me to take them to the Thakria trading centre; I think the covert figure initially told me to take them to the mercantile centre. I've been through most if not all the shops I can find in thakria, how am I supposed to know which one is the so-called trading centre'? Much obliged for any help or further hints.

Everyone has to find their own city's trading center. If you're a Thakrian, it's west off the Avenue of Kings, and it's called Thakria traders market.

Trading centers don't look like shops, but if you type GOODS you should get two columns of commodities like wheat, cotton and so on with buying and selling prices. There's one in every city and village.

And don't worry...Thakria's trading center is the hardest to find of all three. I roamed around for hours before I first found it ^^

Many thanks for your help, finally found it.