It says: "You can only sell it when You are online" but since last update we can sell it offline too via being in AFK mode. SO its better to update that notificaton to something like "You can only sell it when You are Online or in AFK mode"
__________________
Computing the probability that at least one of the following events will occur:
P(a or b ... or z) = 1 - P(!a and !b ... and !z) Probability