Right there. Someone might have them in their bank, but not in the GE. So you say your buying, they throw em in, and your both happy. Same way with selling, they see your selling something, realize they want it, and put offer in. It's just as annoying as when people stand there saying "buy shark 1k buy shark 1k buy shark 1k buy shark 1k" by the time they leave they would have regenerated 20 hp or more, saving themselves from buying a shark