Here is how I do it:http://www.biggerpockets.com/renewsblog/2010/03/10/determining-maximum-purchase-price-mpp/To use the formula, you need to be able to accurately estimate ARV:http://beta.biggerpockets.com/forums/311/topics/73160-primer---estimating-arvYou need to be able to estimate Fixed Costs:http://www.biggerpockets.com/renewsblog/2010/03/17/calculating-fixed-costs-flip-rehab-wholesale-real-estate-deal/You need to be able to estimate rehab costs:http://www.biggerpockets.com/flippingbookAnd you need to determine your desired profits...I strive for 15% of resale value with a minimum of $15K (for lower priced projects).

Fill in the foundation below.Check out the Start Here page http://www.biggerpockets.com/starthere Check out BiggerPockets Ultimate Beginner's Guide - A fantastic free book that walks through many of the key topics of real estate investing.Check out the free BiggerPockets Podcast - A weekly podcast with interviews and a ton of great advice.

In case you missed it check out the keyword alert system posted by our friend @Brandon Turner http://www.biggerpockets.com/renewsblog/2012/12/19...Also Atlanta has a lot of Meetups and networking events so do check them out.

Maybe this thread will have some info for you:http://www.biggerpockets.com/forums/48/topics/77999-finding-comps---faq

Basically, I do this: http://www.biggerpockets.com/renewsblog/2013/02/15...Hope that helps  some! 

Here are a few recommendations for you:Find and connect with other BP members that are in your area http://www.biggerpockets.com/meet Set up keyword alerts to be notified of the topics that interest you http://www.biggerpockets.com/alertsWishing you the best!   

Fill in the foundation below.Check out the Start Here page http://www.biggerpockets.com/starthere Check out BiggerPockets Ultimate Beginner's Guide - A fantastic free book that walks through many of the key topics of real estate investing.Check out the free BiggerPockets Podcast - A weekly podcast with interviews and a ton of great advice.

Here are a few recommendations for you:Find and connect with other BP members that are in your area http://www.biggerpockets.com/meet Set up keyword alerts to be notified of the topics that interest you http://www.biggerpockets.com/alerts Read Beginner’s Guide http://www.biggerpockets.com/real-estate-investing and check out BP Podcast.

Here are a few recommendations for you:Find and connect with other BP members that are in your area http://www.biggerpockets.com/meet Set up keyword alerts to be notified of the topics that interest you http://www.biggerpockets.com/alerts Read Beginner’s Guide http://www.biggerpockets.com/real-estate-investing and check out BP Podcast.

Here are a few recommendations for you:Find and connect with other BP members that are in your area http://www.biggerpockets.com/meet Set up keyword alerts to be notified of the topics that interest you http://www.biggerpockets.com/alerts Read Beginner’s Guide http://www.biggerpockets.com/real-estate-investing and check out BP Podcast.Wishing you the best!