Even though you can buy and sell items at the Market, you can also directly trade money and items with other players through use of a convenient trading window.
You can sell and buy items to and from other players with your Personal Store. After opening your Personal Store, you can still continue to move, battle, or perform other transactions. You can also search for items that other players are currently selling and buying through the Personal Store Window.
Personal Stores remain open until manually closed or all stock is sold. If you log out or die in battle then your store is also automatically closed.
The Personal Store can be accessed from My Info - My Store or with the shortcut ALT+P.
Only items in your main character's inventory can be sold in your Personal Store. From the Personal Store Window, select the Sell tab at the top. Select the item(s) you wish to sell and enter the quantity you wish to sell, and the price you want to sell them for.
To purchase items using your Personal Store select the Buy button from the Personal Store Window at the top. Select from Item Type to find the item you wish to buy then set a price and the amount you wish to purchase and then select Register. You can register up to 5 items at a time this way. Once you've made your selection press Open Store to begin buying. This allows other players to find the items that you are selling when and sell you the item(s) that you wish to purchase, even when you are away.
You can search for and purchase registered items for sale by other players who currently have their Personal Store open.
From the Personal Store Window - Find Sale - Select the Type and Item (or search for the item) - Confirm the price they are charging and enter the desired Quantity then select Buy.
You can search for and sell items to other players that have registered to buy and have their Personal Store open.
From the Personal Store Window - Find Buy- Select the Type and Item you wish to find buyers for - Confirm their Buying Price and enter the Quantity you wish to sell then select Sell.