Apparently not everyone is quite aware what these newly introduced prefixes mean, so this temporary thread should bring some clarity to all of you.
These prefixes were brought to the Marketplace to make it overall more organized, since none of the Marketplace sections have buying, selling and trading threads seperated in different sub-sections (aside from the regular Marketplace).


WTB

"Willing To Buy"
(Used when you are looking to buy an item/account/service etc.)

WTS

"Willing To Sell"
(Used when you are looking to sell an item/account/service etc.)


WTT
"Willing To Trade"
(Used when you are looking to trade an item/account/service etc.)