How to determine is a lead is a good deal or not

[Catherine Morel]

Hello, 

I wanted to ask, how can I determine if a property I am researching is a good deal for a flip? 

I currently live in NYC and I am looking for properties in PA, CT, and NJ and I see good prices but I'm not really sure if it'll be a good investment. Any tips ?

btw, I am looking at these properties on Realtor.com and Zillow.com

:)