We do cold calls, online marketing and sometimes even door knocking to find motivated sellers.

I use different google voice number's in different cities when cold-calling. 

And what do you think about cold calling, I heard its effective, but I'm not sure how to find the phone numbers

The leads are expensive, but they are higher quality and can be managed while working a job, unlike maybe cold calling for hours a day.

I have been trying to break into the residential space on my own by driving for dollars, knocking on doors, sending letters, and cold-calling lists of vacant, pre-foreclosure, and tax-delinquent properties.

No **** they're a little bitter. 

@Les Jean-Pierre I would recommend using direct mail and even cold calling properties right when they enter pre-foreclosure.

So it must be worry that is jumping up and causing cold feet.Just my 2 cents.

Bonus #2: if you send cards or do cold calling and use VA, have a script for people who are not looking to sell, but to buy more - those are also cash buyers often.

Other lead gen methods are cold calling, social media, SEO (direct people who google "sell my house fast" to your website), signs and bill boards, and whatever methods you can use to let people know, YOU ARE BUYING PROPERTIES AT A DISCOUNT BUT WILL CLOSE FAST WITH CASH.