Your experience with Pay Per Lead Sources?

Have you ever paid for local leads from any national companies like for example? Which ones did you find to generate frequent/good leads, if any? And which ones weren’t so good? Anything to look out for?

I haven’t tried any of them yet, but I am definitely interested. Any good ones I should look into?

Thanks! (And BTW, to any other investor looking for ways to get good leads, hopefully this turns out to be a good one for you!)