How do you target owners in FB (A bit time since I don't use it, but don't remember any particular filter allowing this)
LexisNexis is actually the big one who resells that information, you can request a copy of your report from their site for free to see what they got on you. Mine listed my house, I believe the day I bought it, and the source of that information (in my case my town hall).
How? Their site has a physical form and instructions to mail it - which is so fucking ironic given they freely sell our data in digital form but we need to mail them forms to get a copy ourselves.