WTS

This is an common abbreviation for "Want To Sell". It is often followed by whatever the seller is trying to advertise, like "WTS 5 Charr Hides".

Because some traders often spam trade messages in the regular chat channel, ArenaNet implemented a chat filter which will automatically redirect any message containing the word "WTS" into the trade channel, regardless of which channel the player types it into.

See Also: WTB, WTT and Game updates/20060523 (including examples of how the spam filter works)