OK Shane.
The key to walking a neighborhood is knowing and observing what is happening. It is not enough to know what is for sale unless you know how much it was for sale, how long it was listed, the condition, the terms of sale (short, REO, normal), and the closing price of that home. You should be able to walk your neighborhood and be able to point out, that home sold for $X but it was in bad condition, that home sold for $Y because some investor bought it 6 months ago for $W and rehabbed it, that home over there was OK condition but could not go FHA due to no appliances and was bought by an investor who has yet to stop by, etc.
You get the idea? You also need to know the sq ft of these homes, lot size, etc. This way you become an expert in the neighborhood. Now you know what homes sell for in your area. How much they sell for in different levels of condition.
This is a process you will be repeating every time you buy a home in any neighborhood. In fact every time I buy a fix/flip. I will have researched all of the above and a lot more info before even buying it. I know everything that has moved in that area, the price, the condition, the Realtors, etc. Everything before dropping one dime on a home/deal.
Does that make sense? This is where you start.
If you want me to discuss more - let me know and I will continue. If you have questions, let me know also.