If the owners of the domain is "the owner of the domains is respectable in the domain world", then he would have hired someone who knows what they are doing with domain name sales.  Surely this guy isn't going to hire someone who has no clue to the value of any of the assets he's selling.

Just give it up and come clean, the jig is up.. u're not scamming anyone else.

https://www.namepros.com/threads/appraise-these-llll-com-bbny-com.1017858/#post-6146259