To trade, you first must select the character or name of the player you want to trade with. Then hit the hotkey ALT+A or A to open up the General actions menu and click the icon that says"Exchange." You may trade with anyone at any time, except when you or they are engaged in Merchant Mode. Your "target" character that you wish to trade with must be within visible range, which is about 20 meters (the edge of the compass). Equipment may not be equipped or unequipped while trading, potions may not be used, and your inventory may not be rearranged. You may, however, move around, attack, and talk while performing a trade.
	Once you have selected the character or name of the player you want to trade with, this window will pop up. On the other player's screen it will show a window saying that you're wanting to trade, ans ask whether the other player wants to "Confirm" or "Cancel" the trade with you. You only get the "Cancel" option, since you are the one who initiated the trade.

	Once the other player has accepted your invitation to trade, the trade window opens. As you can see in the background of this screenshot, my character is next to kaliyuga--the person I'm trading with--to perform this trade. This is the way most trades are done, simply because clicking on someone else's character makes your character run over to them. Like in the Merchant Mode window, the trade window has three sections, with your inventory displayed in the bottom section. The amount of gold you have is also displayed, at the bottom of the window under your inventory but above the buttons. Please note the highlighting of the buttons at the very bottom. Right now they show that you are still in the process of deciding what you want to put into your half of the trade window. To input your items into the trade window, find them in the inventory part of the window and double-click on their icons. If there is more than one of the item you want to trade, you will have to specify the amount. Keep in mind that you can fit a maximum of ten different types of items into the trade window. Also, there is always room to add money in, since it has its own little section.
	Once you have input all of the items you want to trade, click the "Confirm" button. Your items will become highlighted by a bright, fuzzy, white glow around their edges. Again, look at the highlighting of the buttons at the bottom of the window. Right now they showthat you have checked and are satisfied with the items you put into the trade window. Once the other person hits their "Confirm" button, the items they are trading you will be surrounded by the bright, fuzzy, white glow as well. You will know that the other person has checked your items and is satisfied with them when the"Trade" button becomes highlighted. Always check the items the other person isgiving you, then click your "Trade" button. As soon as the other person hits theirs, the trade will automatically be completed and you will each receive the other person's traded goods. (Thank you kaliyuga for the screenshots!)
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When trading pets, be sure to check the pet's level every single time. People selling pets below average market prices are usually trying to scam you. The pet scam is very common and many people fall for it. To avoid it, take your time, check the things you are getting, and don't be afraid to just say "No thanks, I changed my mind about it." If the deal looks too good to be true, it probably is. Don't be blinded by excitement or greed.

Signs of a pet scammer include:

1. Repeated closing/opening of the trade window.
2. Excuses about lagging, bumping the wrong key, mouse malfunctions, little brothers, forgetting "something," etc.
3. Asking you to hurry or saying that they're in a rush and have to leave/go to sleep/eat/shutdown, etc.
4. Threatening that they may sell the cheap pet to someone else.
5. Saying the pet isn't worth much to them any more and they just want to dump it.
6. Finally swapping the pet out for a level 1 after some or all of the above things have happened.