I don't think that the address/key was sold/bought because there's no reason for these first miners to do it.
Not all early miners are rich by now, so if you hold some old (and by now useless) private keys, an offer could be attractive.
For the buyers, I always assume it has to do with taxes. "Proving" you owned Bitcoins a long time ago, and your current riches really came from capital gains and not crime. Or just bragging rights, but it seems like cheating if you bought the empty address.
Message:
who sells for 1,000 $ their old empty address (block 1 - 2000)?
validity: 29/Nov/2022 - 01/Dec/2022 0000 UTC
Address:
1FxoVMjdp6ey3wzU7E9ddrFjYhLwZm3QWk
Signature:
IJ6Mypx8nYHOl1CLFKCiLGjANS3L1PuJaVVkS0ydxSh0a+K2pK7RsDockbbeyNlWWdly6SzIOXXKbrBjbRVuvyA=
That's not an old address. Are you using this thread for advertising? If so, you should post in Digital Goods.