Take a look at the posters below. They're textbook assembly line forgeries in my opinion. All in the same pen, all perfectly placed, full non-rushed signatures that look like they were all signed by the same person.
I looked at several completed items and they were obvious forgeries.
Any time you see a seller pumping out signed posters it should automatically be a red flag. All anyone would have to do is spend a day in the street collecting and watching other ip collectors and you will observe that a poster is a very rare exception- too much hassle.