This seller violates the rules for character transfer by posting bids on his alt character.
As can be seen from the following thread, his alt “Nathanien D” was sold on 21 June 2020: SOLD Miner pilot with 9.4 Mil SP
Previously, however, he had posted “offers” on this sales thread (8 May 2020 & 16 May 2020). And he subsequently (11 June 2020) referenced the latest bid as the highest bid of 26 bill. To the OP: No need to edit the posts, as we have screenshots.
This is a scam. And it is in direct violation of the rules for character sales. Perhaps it should earn the seller a banned account?