RE investment ???

Hey. Maria here. New to the RE investment biz and could use some sound
advice. I'm in need of some motivated seller leads and have been
sending out newspaper ads in hopes of getting some responses. But no
such luck so far. I've already spent more money than I can afford and
haven't even gotten one lead. A real estate friend of mine suggested
using the affiliate program at the we-buy-and-sell-homes website, but I
don't know. He said that he's used them and had gotten some really good
leads from them. But still, it's the first I'd heard of them and I'm a
little skeptical. I was wondering if anyone's ever heard of them. If
so, what did you think? Are they credible? Provide good service? What
did you think?