Many old keys have been sold or leaked, particularly once they've become worthless.
Yes, there are threads selling old addresses, especially 2013-2014 addresses.
https://bitcointalk.org/index.php?topic=2893269.0But this address is not old, it is veryveryold. Who mined 2 weeks after Bitcoin was released? I expected that Satoshi had the most mined blocks, so it would be very likely that it is Satoshi. Do you think that this miner sold his address now, 13 years later? And I don't think that Satoshi would sell addresses.