[metamet]

But what type of range are we talking? Tens, hundreds, thousands?

[dylan604]

It could also mean that if you have to ask... or the first rule of data brokering...

Seems like the first thing to do would be to get an account with one of these data brokers. I'd imagine most of these places are "contact us for pricing" so they can play used car salesman games

Or, you could ask John Oliver to do it for you and then tell all of us on one of his episodes exactly how in depth it could get. They have the money to do this, and it seems like something right in his team's wheel house

[some_random]

If you need John Oliver to do it maybe it's not such a big problem? If no one here is able to provide a single concrete example, maybe it's not real?