Mike, I see your side too. I agree some things I think people just want to be valuable. That is kind of human nature if you have something odd of course you want "your" item to be valuable. While hyping may lead to short term bumps I think it very rarely leads to real staying value.
In terms of this error. I was turned onto this by a very advanced collector long ago and it was kept under the radar. I have looked and looked and only managed to pull the 2 cards to date and this has been over many years. I know this is the same for the other 5-6 folks I know who are looking for these. To date I think I have the only Bradley there are a few copies of Bergen and Doolan floating around. It really is a tough and neat little error. Is it worth thousands upon thousands once again only worth what someone is willing to pay.
To me it's a great a thing little errors like this. It still shows that there insights into the production of this set as well new things to be found, that perhaps aren't as random as they appear. That's part of the magic of this set or the craziness of this set all depends on what side of the fence you sit on.
Cheers,
John