I think ter is pretty reliable, but for some reason, I scan bedpage. Then I recently subscribed to Erotic Monkey, but I think a lot of the reviews on EM are fake. That's where I found the MP I reviewed here.
Before Backpage was shutdown, I used that, and found plenty of private providers.
Like anything on the internet, you have to take everything with a grain of salt, and you're often rolling the dice.
IMO, there's pluses and minuses to private vs. MP. With private, you don't know what you're walking into (but I've never had a problem; I just don't like to blindly walk into a private apt/house where I could get held up, or worse). But you're almost guaranteed fs with privates. With AMPs, the pickings are pretty bad in my experience, but at least I have the feeling of more safety if shit breaks out, being they're normally on busy streets. But there's not always a guarantee of FS either. I found my regular legit masseuse when she listed on bedpage, with pics of hot chicks.
I was thinking of hitting up a private I found advertised on bedpage this morn. Now I'm feeling paranoid lol.