This is bullshit and your offer is bullshit. What your talking about doesn't exist.
If you want private phones, buy a Pixel 3a and install GrapheneOS onto it.
I believe he is trying to say that he has these
https://encrophone.com/en/ however, there are very few dealers that you can get these from and I doubt he is one of the few.
Encrophone is bullshit, android is bullshit and isnt secure at all. All those encrypted features are available for free on the app store