I can get you his exact house address and most basic information (full name, zip code if he's in the us, isp, etc). We can use an escrow. The payment will be much higher than $100 though, and I'd say around $900-$1,400 depending on a few factors.
Sounds like a bit much for clicking around a bit TBH..
Snagged an Ip off of him but it belongs to "Hotspot commercial VPN network"..
Totally didn't notice the logger though.. (Thanks "Hacker"

but no dice on that try..)
So.. The guy knows what he's doing a bit..
I would suggest your friend block the creep, and report the account to Facebook. Facebook may or may not report him to the police, but they will ban the person for having a fake profile (in addition to the blackmail). Facebook should be able to provide information about the person's IP addresses used to access the Facebook account to law enforcement.
I believe it is theoretically possible to embed a virus into an image file that can run arbitrary code on someone's computer. This is probably the only way you will be able to get more than the creep's IP address on your own. How this is done is outside of my area of expertise, and I would caution that sending a file with a virus is almost certainly illegal.