I still have million reichsmark from 1923 around somewhere. I don’t believe it would buy a stamp.
https://www.amazon.com/When-Money-Dies-Devaluation-Hyperinflation/dp/1586489941/ref=sr_1_1?crid=1Z3F3DT6AM3S5&keywords=when+money+dies+adam+fergusson&qid=1660692519&sprefix=when+mone%2Caps%2C379&sr=8-1