If you are looking for value much like appraisers will, you will look at comparables that have sold in the neighborhood in the last 6 months with more weight on the ones sold in the last 3 months. When you ask about price per square foot you are asking a very vague question because there are so many variables. Each neighborhood is different. You will usually see 1 story homes and smaller homes with a slightly higher price/square foot. For that very reason you will see appraisers compare 1 story to 1 story and 2 story to 2 story homes. Hope this helps.
$72-$100+--1 or 2 story? 2, 3, 4 or 5 BR, 1, 2, 2.5 or more baths? Pool or no pool? Other features, upgrades or amenities? Which development?
You really should rethink your approach, and retain a buyer's agent. An agent who served you would also be able to advise you about negotiating strategies and many other factors that you may not be aware of or consider.
I agree the best approach when considering an area to acquire real estate is to get with a Realtor. We can provide you with allot of market information, and evaluation reports. You can use my web site to search the MLS at no cost.