How much money would someone have to pay you to agree to this?

Let’s say that one day a pair of 2 private detectives approached you with the following offer:

They wanted you to agree to allow them to follow you around for the rest of your life working in 2 12-hour shifts documenting where you go, who you talk to and the content of those conversations, who you date, the details of those relationships, who you are friends with, what websites you visit, where you live, work, etc. What your political preferences are, your income, details about your children’s lives etc. Basically you agree to allow them to try to find out anything they can about you.

The detectives doing this would then be allowed to sell what they find out about you to whoever they want for however much money they could get for it.

How much money per year would someone have to pay you to agree to this?