A simple compilation of what not to do.

the traders that say What u want!? im like wtf.
the traders that ask for more then what they have listed....
the traders that make you wait 1 minute, *then you wait forever to trade.
the traders that already sold the item they have listed, im like srly.. remove the item from your trade, this happens a lot.
the traders that take forever to write something in steam friends chat.
the traders that say someone else just added me, and wants to buy it too, you will need to add more if you want it, i´m like dat bluff.
the traders that take forever to accept friend request.
the traders that just want keys and refuse metal.
traders that say rep me? ..
the dude that adds you to buy something that you aren´t selling in outpost.
the dudes that ask for discount in trade isntead of posting first in your post.
The dudes that ignore the prices listed on your trade and demands tf.backpack prices.
the dudes that say its they birthday so they can get free stuff or discounts..
The dudes that pay with weapons.
the dudes that add you and say that the item they want to trade for your stuff worths more then it does.
the dudes that say F#$#$ Y#$ then delete you when you say I´m not interested. My personal counter attack tatic is to login in an alt account, add the dude and say U "#$ "#$"4 "#$" then delete him before he can reply .
The dudes that put a girls pic in theyr profile and pretend theyr girls for special prices.
when a dude wants to stay in your friends list after the trade.
the dudes that say what can you give me for this item..
the dudes that add you asking for free stuff.
people that add you to buy your stuff in a couple of days.
dudes that imeditialy send u a trade invite without telling you wich item, im like how im suposed to know.
you say thank you after the trade, and the other person just deletes you and says nothing .3
the "I saw your trade on outpost" guys - "which one?" "erm...."
the I added you because I'm a scammer and banned on outpost guys
the I can't understand what you're selling and what your wishlist is guys [trying to buy what you're buying / sell what you're selling]
the I made an offer on your trade but now that you've accepted it I change my mind/want more guys
"When a trader gives you ♥♥♥♥, and later on says 'his little brother was on'."
(random guy add) "20 единиц оружия для вашего необычного?"
"wtf? try english"
The one who is supposedly "new to TF2" but who will automagically aim for the most valuable items in your inventory (Bill's, Buds, unusuals etc).
The one who adds you and goes afk for the rest of the day 5 seconds later.
The one who is online but won't bother replying to your messages.
The one who sends you a friend request and cancels it before you're able to accept it.
The one who will list the store price of his games in brackets.
The one who adds you and later asks you "Why the heck did you add me?"
The one who will call you a scammer for offering 1 scrap below/above average price.
The one who assumes you're a noob and offers some weapons and hats for your buds
The one who will quicksell or offer you "cheap" items for x1.5 their value.
The one who adds you without reading your notes (despite clearly stating I do not want other offers, I accept only keys, please do not add me, offer on my trade etc).
the one who adds you, then says "wait" looking for a cheaper one
traders that uber hightball saying that theyr item is very rare and therefore it worths 1 bud aka uncraft vita saws and stuff.

by pew pew, Xile, Mr Tiger, eddy, norby89, rusty frame