Letting the world know what you just found, if a decent haul, would tend to bring more people into the mix at the next auction. This can easily result in a stream of novices, with dreams of riches in their eyes, bidding up units far beyond their worth.
Yes, this means the dunderheads that post every detail of their lives on whatever the equivalent of Facebook is today. An example of this is the storage auction show on tv. While it is set in Southern California, it has had an effect across the country of more interest by people with more cash than brains.
Wise people speak because they have something to say. Fools talk because they have to say something.