Also, its impossible for Hal to have created this message - Bitcoin signmessages did not exist at the time. Whether sold or not, the message was clearly signed by someone after Hal's passing (or at a point where he could no longer directly use a computer).

To clarify, or that *anyone* purchased (or otherwise acquired) Hal's keys. Not strictly Martin.

https://martinshkreli.substack.com/p/paul-le-roux-is-satoshi

only proves someone with access to Hal Finney's private key (not Satoshi's) signed the claimed message. Also they misspelled his name.