A lot of them are "You get what you pay for" kinda people. Many of them are former cops/detectives who retired and do the PI gig for extra cash. Alot of it is knowing which databases to use. With the advent of the internet, most people can look things up on their own if they're willing to pay the fees associated with each site.
Are you trying to find someone who can track me down?
Of every one hundred men, ten should not even be here. Eighty are nothing but targets. Nine are real fighters, and we are lucky to have them, for they make the battle. Ah, but the One... One of them is a Warrior... He will bring the others back.
"Wrong door, buddy!"
Let no man's ghost say my training failed him.