According to @danheld, he is listing a 2009 BMW M3 with a 4.0L V8 and 420 HP for 0.3 BTC, referencing a Reddit post by u/BTC_Hadzija and quoting reasons including crash risk, environmental concerns, and theft risk for moving to sell, source: https://twitter.com/danheld/status/1997727580661944507 The tweet confirms a BTC-denominated asking price but provides no USD quote, buyer details, or on-chain transaction hash, so there is no verifiable settlement data at this time, source: https://twitter.com/danheld/status/1997727580661944507 For pricing context and unit clarity, 0.3 BTC equals 30,000,000 satoshis under the Bitcoin unit definition, source: https://bitcoin.org/en/glossary/satoshi For traders monitoring real-world Bitcoin usage, this is a concrete example of a peer-to-peer asset listing priced in BTC during December 2025, which can be tracked as a data point for BTC-denominated commerce, source: https://twitter.com/danheld/status/1997727580661944507