i just realized why they (Heidenberg) put those sales on line - no one can bother them anymore to make some pages copies, to find out how was particular lot sold, make a pic of plates, etc. ( as they have a nice and large library )
i would agree with mr Kolbe on his statement, yes prices can drop down;
but also I would add, it depends how far those firm go with publishing theses sales on line
so far - its selection is very raw - just for beginners and to kick off folks with their inquiries