You’ve a lot of this stuff eh? What is the draw for you? Are they blank on the other sides? Like unsent ones or? It would be fun to look through them and also a great way to share.
I urge you to consider WEBP format perhaps. Its quality remains and the file sizes are much smaller. Saving you room for more. Also if you do scan these, mayb something like a Doxie would work. I have an old one which is fantastic and quick for single side scans of this size, and no need for the lifting of flatbed and swapping. Saving much time if you have many.
The Death report for Kurt Cobain. Mostly from morbid curiosity and a love for Nirvana. I don’t do that for everyone or anything like that. That’s the weirdest one. 😅