There's no special "historian card" that you need to show to access sources. Everybody has the right to study history on their own, and I guess the world would be a much better place if many of us did.
> Everybody has the right to study history on their own, and I guess the world would be a much better place if many of us did.
I guess?
History is something that historians do, not study. There is a meaningful difference between an expert applying actual methods and an interested layperson reading primary sources for their own edification. Not to say that people should be prevented from doing that, but it does seem like a bait and switch to say "what about the historians" and then swap to "what about this entirely different set of people" when it becomes clear that historians aren't actually using ebay in the method you describe.
If you really care about laypeople having access to primary sources, a way bigger problem is the fact that most archives will not allow non-credentialed people to access their materials. There's way more "censorship" going on there than anything happening on ebay if that counts.
Doing history is original analysis and narrative. The point here is to meaningfully explain the difference between what a history undergrad is doing and what a professional historian is doing.
Consider an algorithms class in undergrad. You can read about all sorts of algorithms. But learning the Nth algorithm won't transform your work into original algorithms research. You are only consuming information, not producing it. Similarly, just reading other history research can teach you things but isn't what historians are doing. A lot of "history buffs" fall into this category and love to read pop history and consider themselves experts.
Now consider somebody who wants to develop an original algorithm. But they've never learned any analysis methods and they've never critically engaged with the literature. They don't know how to prove an algorithm's correctness or behavior rigorously. There are a ton of these people online. They often gravitate to trying to solve P=NP. This would be comparable to somebody who never learned historiography (the method of doing history) reading primary sources and trying to replicate what historians are doing. Like any field, history has methods. It isn't just ad-hoc decision making from people who happen to have a title next to their name.
In CS this is largely harmless. But for many fields within history, accessing the archive also damages it because people are touching one-of-a-kind objects. So archives are selective in who they choose to allow to access their materials.
N=1, but yes, surprisingly often. The one I know buys a lot of old books from people online to keep in their home library and has on occasion actually found some very rare items that people selling them simply don't know the rarity of. I've heard of at least one such find end up on display in a museum (incidentally, also a children's book, but probably not Seuss). And it's not just historians who have a use for unaltered source material.
While I don't mind cleaning up/modernizing certain things and not printing the originals anymore, not allowing the existing originals to be sold even by independent third-party sellers is just horrible.
We've got a lot of old books purchased second hand because historians tend to like old books, but none of them are primary sources used for research. All of the primary sources are coming directly from archives or inter-library-loans.
Fair enough, but if you're a historian wiring a book about Hitler, you'll probably want a copy of Mein Kampf that you can take home either way, even if you'll still refer to the archive to double-check direct citations. And if their only option are the archived version because no unaltered copies exist on the 2nd-hand market, that's a pretty high barrier to entry.
Yes, there are plenty of of options if you can't find a copy on eBay, especially these days, but nonetheless, there are plenty of legitimate reasons for historians and laypeople alike to want originals of old works.
I would be pretty surprised if it becomes impossible for a historian using these six books as primary sources to get long-term access to the original material. This can be a little more difficult with family archives since family archives do tend to paper over the colorful stuff in their history, but if people are truly concerned here about family archives limiting access to unsavory parts of their history for historians (which I don't believe is the reason for this outrage) then there's centuries of other examples to complain about.
My wife is a historian. We've got hundreds and hundreds of books at home. Exactly zero ebay purchases. Among her colleagues, I'd bet that none of them have ever purchased a primary source on ebay.
Given how frequently people reference historians and history in these discussions, I'm surprised that nobody ever seems to ask them their opinions.