Yes, I do if I can. My dad always called a "hunter and gatherer" with the emphasis on gatherer. Sometimes books too may be of historical significance and I own some which are to be considered "historical sources" rather than "books" in the most neutral sense of the term.
I got something that is claimed and certificated to be a piece of the Berlin Wall. I surely don't believe it (with all the pieces of the wall sold on the flea markets in Berlin you could probably build the wall multiple times) but in any case it is a piece significant to the "cultural impact" in public perception rather than the actual matter of the wall itself

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More authentic stuff I got is a WW2 time American Pilot cap (likely never actually worn during the war but stockpiled and never used back then), a British WW2 helmet, a piece of shrapnel. I also got several 1000 Reichsmark bank notes of 1910 (apparently an ancestor of us won the then phenomenal sum of 30 000 Reichsmark in a lottery but didn't really benefit from saving the money when in 1923 it ended up all worseless). I also got some other coinage from older days and some that may be more interesting in decades to come (after all it is just almost a decade ago that Germany and other European countries adopted the Euro). I also got some items that will increase in historical significance. In the late 90s, when I was about 14 -15 years old I started contacting WW2 pilots trying to interview them / corresponding with them. I recorded an interview which I did with one of them on a casette (tape cassettes same as floppy disks also are so rapidly disappearing that before long they too may get an air of being "historical items") and got the letters and photographs of quite a few others. Most of them have died since.
I also started at an extremely young age to gather newspapers about specific stories. Had it not been for a friends telling me that "God would hate that" which back then made me throw them away, I probably still would have had the newspapers reporting about the gulf war of 1990/1991 (so as a six / seven year old kid my interest in history was showing). The oldest original papers I collected and still have are from 1995 and ever since I tried to keep papers reporting on events that will be considered of historical importance.
Most of the stuff I collect is of personal nostalgic importance however, rather than of "historical" value. I got a lot of stuff saved that I did as a very young kid (remember that first ever LBT art?) including long stories I wrote as a primary kid (one is titled "Jack the seaman"), wishlists of long past birthdays or christmases and a lot of other personal items which would be insignificant to others but which have a very high personal value for me.
Thank you for the question
