Best ways to find vacant lots to build on

[Casey Gray]

I'm trying to get my feet wet in REI by helping my mentor in anyway I can. He is looking for some vacant lots to build on as he exits flipping and enters into development. He has tasked me with finding vacant lots however possible. I figured what better place to ask than the BP community.

So my question is what are some of the best ways to find vacant lots below market cost? MLS, Craigslist, driving around, or auctions? Thank you for your input.