Having trouble making sense of analysis numbers

[Sarkis Gezalyan]

Hey guys, 

I've been doing searches on Redfin for properties in good investment cities/areas that individuals from these forums often talk about. When time comes to run a quick analysis on the numbers, they don't make any sense. NONE of the properties are worth investing in. Am I doing something wrong?  Is Redfin not a good option, or do people usually bargain the price down in order for the numbers to make sense?