Not much... But here some facts:
President Hindenburg died in August 1934, and the last traces of the old Weimar Republic quickly faded away. The Hindenburg Memorial Issue, shown in this stamp was issued at the beginning of September.
The 3 Pf., 5 Pf. 6 Pf., 8 Pf., 12 Pf., and 25 Pf. stamps of the Hindenburg definitive stamp series were overprinted in black, between the stamp designs, as a sign of mourning.
Stamps or envelopes, with black borders, are a traditional sign of mourning.
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The Deutsch Reich issues didn't use cents. The stamp would have to be pfennings or marks. It could also be Kreuzers. You need to describe the stamp (colour, condition, what's on the stamp) before a price can be given. Deutsch Reich stamps cover a long period of history up to the end of WW2, so the more detail, the easier it is to narrow down the issue
The stamp was issued in a period of hyperinflation for Germany; a million marks was probably equivalent to 2 or 3 cents US at the time. Depending on the condition, it might be worth 20 cents or so today. You could check a Scott catalogue or ask a dealer if you want a more precise estimate. I know that back in the 1970s they were fairly common in $2.00 "grab bags" of a hundred stamps.
The value of a 1936 Deutsches Reich 8 Mark Otto von Bismarck stamp can vary significantly based on its condition, rarity, and demand among collectors. Generally, it can range from around $5 to over $50 for used examples, while mint condition stamps could be worth more. For an accurate appraisal, consulting a philatelist or checking recent auction sales is advisable.
"Deutschland" is Germany, in German. The country called itself the "Reich" (sort of like kingdom) under the Kaisers and under Hitler, but the term was abolished after the war. That means your stamp was issued before 1946. You'll need to post a new question with a more detailed description so it can be identified more specifically.
Hugo L Black stamp was issued when
The One Penny Black had a silhouette of Queen Victoria on it.
It's approx. AUD189, US99
The adolf hitler stamp is worth about roughly 1,350 in this era. you are a very lucky to have this one of a kind stamp.
Harriet Tubman was the first to have her own stamp. Some black female postal workers appeared on an earlier stamp.
Gold stamps are worth the least amount of money. If you get a green stamp it is worth a couple hundred dollars. The black stamp is priceless.
Yes, Canadian border officials typically stamp passports upon entry into Canada.