I think the bicycle wheel condition of everything but the $2s and $20s plus the fact that the auction ended on Christmas evening drove the price down, but yeah I was surprised to see them sell that low.
Many people want something familiar and generic. For example, many people will go to Olive Garden and pay more for some fake frozen crap than a local place that will likely be cheaper and taste like real italian food. The familiarity factor is often very strong.