Check "ELHAMY" Guide in srf , he explained the new job system well ,
viewtopic.php?f=5&t=127882Well , now there isn't stall network related to each city , it got removed and joymax added a new system called "consigment" , much like the auction house in WoW if you ever tried it .
If you didn't try WoW , I Will explain it here , you go to an Npc called consigment (look at map in towns , he isn't in all towns though) , talk to him and you will find an option to put your items in consigment , after you put up to 10 items you will pay a small fee (1% of the item price) and if you take your item out after you put it in you won't take the gold you paid for it to be registered (the 1%) ..
Now you have your items registered , you should find an option that allows you to see the items that are registered by all the players in the server , search for what you need there , if your items get sold , you will pay another 1% , so overall you pay 2% of the item price , one before selling and one after selling .
One more thing : if you register an item with a price lower than 1 million , you won't pay the 2% fee .