You might also want to narrow to price range.

I've narrowed down the area to 33914 so far. 

For instance, if I think the house is worth $80k and the mortgage being foreclosed on was taken out 2 years ago for $100k I just stop my analysis there because there is no equity and the lender will buy it back for more than it's worth. 95% of the foreclosed properties in my area still fall into that category so I can quickly narrow down the list.From there I do a physical drive-by.

Greetings @Daria B. and @Mike Cumbie;  I really appreciate your taking the time to reply. 

The less educated you are in RE Investing, the more narrow your ability to Invest in all kinds of places.Unfortunately, the only answer I can give you is to learn as much as you WANT.

It don't work, so, they all started to Buy up all the houses from downtown, South to the Base and build MacMansions with no Visitor parking, on narrow streets and infrastructure from a hundred years ago.

I wanted to share about my first rental property that I closed on last September 2015.I was VERY scared if losing money but I was more scared of not taking action.......Working with "estimate" numbers for the first time can be so nerve wrecking and can most certainly cause analysis paralysis but here's what I did..First, I got a qualification for an FHA loan.Got approved for $220,000 so only then did I start narrowing down which neighborhoods I could get into.Since the inventory was extremely and IS still low and prices high I had to go to a D neighborhood.This made me very scared, especially because where I could actually afford and where there were Multi families available were at least an hour away....but again.....more scared of not taking action....I found a 3 family and waited to hear from loan officer how much my monthly payments would be.Once I found that out, I went on to rentometer.com to see how much market rents go in that area.I then tried to come up with all other expenses which wereWater-Public Utility (Hallway lights)Future ExpensesI put all those together and seemed like the numbers worked so I went for it and CLOSED.

I narrowed it down to specific cities in my area that I am interested in investing, last recorded sale earlier than 2009, over 1,000 sq ft, under $200,000 last recorded sale.

@Daria B. and @Chris Mason - rental comps is not required as far as I know.

If the cost of stamps is what's interfering in your marketing, you have a budget problem.I would work on refining your list by segmenting into A, B and C prospects.