There are some rules for avoiding the sale of hacked accounts which links to personal info.
Selling invites is allowed, but there are some restrictions in order to prevent people from selling accounts and invites obtained through hacking. In order to sell invites or accounts to invite-only sites, you must:
- Have some history here, with more history being required for trades of invites/accounts in bulk. Or,
- Have substantial history on reputable invite trading forums such as torrentinvites.org which prohibit selling hacked accounts. Or,
- Be vouched for by someone from one of the above two categories.
For now a red tag would be Ok. It could be reversed if he could confirm that his sale is legitimate somehow. But I don't think it is legit anyway.