I had a "BUYING" thread recently and was able to find and bought what I was looking for. So when I closed the thread, I wanted also to change the prefix and there was nothing else I can use. Only available prefixes are: selling, trading, traded, sold, deal, and "no prefix". I tried to select "no prefix" but it errors out. Maybe there should be the a "BOUGHT" prefix. Also, maybe add "TRADING FOR" and "TRADED FOR". "FOUND" prefix could be used instead or "BOUGHT" and "TRADED FOR".