this is straight from the DO forums:
First of all the reason Trader is so sought after is because there is a a high yield for Gold and a decent amount of Experience to be gained.
PLEASE TAKE NOTICE: YOU ARE CARRYING YOUR GUILD'S MONEY, YOU CAN BE PK'ED OUTSIDE OF TOWNS, THE PK'ER WILL THEN GET YOUR GUILDS MONEY. TO PREVENT THIS FROM HAPPENING TURN OFF YOUR TRADER TITLE BY CLICKING FRIENDS OR USING KEYBOARD COMMAND ALT+F, THEN SELECT 'MODIFY TITLE' SO YOU AREN'T A WALKING BAG OF MONEY WITH A TARGET ON YOUR BACK. ALSO, DO NOT BE STUPID AND JUST GO AFK ON A PK MAP.
The main concept behind trading is to buy a material at a low price at Point A and then run it to Point B and sell it for a high price. In order to do the quest do the following:
1 Go to the Finance Officer of your Guild City.
2 Select the option 'Recieve Bank Notes'
3 Again speaking with the Finance Officer, select the 'Merchant Shop' option.
4 Buy GRAIN, as it has the highest Buy/Sell Profit Margin. Buy as much as you can. It is best to start at ~3, 6, 9, or 12~ as you will only need to buy 2 GRAIN.
5 Run to the next City.
*if you do not know what city it is speak to the Government official in your Guild City and select the "Commercial Route" option.
6 Once you run to the next city you will need to take note of the clock in the top right corner of the game. You will want to wait for ~3, 6, 9, or 12~ before you sell your GRAIN. You sell the grain simply by speaking the the Finance Officer and selecting "Merchant Shop" from the list of options. It is necessary to wait for these specific times as they are when GRAIN will be selling for the most.
7 Now, after selling the first batch of GRAIN, speak with the Finance Official again and buy as much GRAIN as possible. Again it is best to buy at ~3, 6, 9, or 12~ as you will only need to buy 7 GRAIN.
8 Run back to your Guild City.
9 Speak with the Finance Officer, once again waiting for ~3, 6, 9, or 12~, and sell all of your GRAIN.
10 Now, with all your GRAIN sold, having ran from Point A to Point B back to Point A, you can turn in your bank note. Once you turn in your bank note you will receive 20% of the gold you earned and 45,000(+) Exp.
You can run from as a trader up to 8 times per day, each day you get Trader. It really is an excellent way to make Gold, and as such only a few are appointed Trader per day. Each Guild is different, but usually if you want to get Trader it would be wise to do things for your City to gain Guild Contributions.
Subject: Trader Help 
Sun Nov 29, 2009 5:51 pm
