These are some of the most valuable German stamps that have either been sold or estimated in the collector’s market.
Some of these stamps can be found on Sandafayre and Collectors Weekly (both links can be found in the sources below).
There is a useful article that teaches how to spot valuable German stamps. Check it out here: http://www.thestampcollector.net/guide_germany_germania.html
N.B.: If have some old stamps at home, but want to appraise them, here is a good article from Warwick & Warwick on “How to appraise stamps”: https://www.warwickandwarwick.com/news/guides/how-to-appraise-stamps
Sources:
1). https://findyourstampsvalue.com/rarest-stamps/most-valuable-german-stamps
2). https://www.sandafayre.com/germany-stamps?g=1&pp=24&so=2&pn=1
3). https://www.philatelicly.com/rarest-stamps-most-valuable-german-stamps/
4). https://www.cherrystoneauctions.com/_auction/results.asp?auction=200705&task=submit&country=GERMANY
5). https://www.collectorsweekly.com/stamps/german/auctions?sort=highPrice
6). http://www.thestampcollector.net/guide_germany_germania.html
If you want to learn more on how to grade and value stamps, consider these resources:
https://www.warwickandwarwick.com/news/guides/stamp-grading
https://findyourstampsvalue.com/stampwiki/article/postage-stamp-grading-and-condition
https://www.philatelicfoundation.org/expertizing-process/grading/
Music:
Moonlight Sonata – Beethoven
Disclaimer
The accuracy of this video is based on the data collected at the time available and the date this video was published. If the video is old (more than six months), then, new data might have come out. By the way, all data sources are found in the description below. Hope you enjoy this video!