The British Guiana 1c Magenta stamp went on display in London after being sold for $8.3 million.
Notes on verification
Multiple independent sources (Euronews, Wikipedia, Yahoo Finance) confirm the sale price of $8.307 million and subsequent public display at Stanley Gibbons' London store in 2021. [cascade flags: wikipedia_dropped_other_sources_exist | tier=unverified indep_score=0.3 clusters=2 claim_tier=notable] [rescored 2026-09-15: curated origin-host map (PR #65); unclassified hosts no longer scored as aggregators]
Sources
- Rare British Guiana 1c Magenta stamp to go on display (seed:culture_and_philosophy)
- https://www.euronews.com/culture/2021/11/10/the-mona-lisa-of-stamps-worth-8-million-goes-on-display-in-london (corroboration)
- https://uk.finance.yahoo.com/news/worlds-most-valuable-stamp-bought-for-8-m-by-u-ks-stanley-gibbons-102403853.html (corroboration)