Sometimes you'll see the abbreviation "SB" being used when someone is selling Zakum Helms, for example "S> Zak Helm 50/100m SB 20m". In this case SB stands for Skill Book. The difference is usually the slash in between the S and the B. So S/B = Starting bid and SB = Skillbook
When you don't want your thread faded away, you want your thread being regconized by other people, you bump your thread. Mostly you would bump for a selling thread