Just a comment on what Realtor Brenda said re the elementary schools - the disparity results in the fact that most of the students at PTree come from the apartments in the Ptree Crnrs area (lower income), whereas the ones at Simpson live in the surrounding homes which cost upwards of the mid-200K range (higher income). Additionally, anyone familiar with the area knows it is culturally very diverse and includes a large number of children who do not speak English as a first langugae, which statistics show affect results of standardized testing. Eventually however, all the kids end up at the same middle and high schools - Pinckneyville and Norcross.
It's no secret that the market in general is very slow right now. In my opinion one of the things that could be making a difference is that Dunwoody Manor falls under the city of Norcross where Peachtree Corners does not.
Norcross gets alot of bad press due to crime, foreclosures, and quality of schools. Since Dunwoody Manor falls under the city of Norcross many home buyers may be avoiding searching for homes in Norcross for these reasons and these communities are being overlooked.
This is the only reason I can see that Peachtree Corners may have more sales activity.
If the home is being properly marketed then the price is the answer every time, unfortunately. The top 10% of homes are selling FAST, the rest of the homes have to wait to get to the top 10%.