The Sandy Springs area inside 285 didn't have much activity in February the past two years so it's tough to really say much about the averages. There is also a very wide range of prices. The average price fluctuates a lot depending on how many $500,000 homes vs. the number of $million plus homes selling in a particular month.
This is one of the most expensive housing areas in the Atlanta area. Many small ranch homes from the 60s are being replaced with homes that are well above one million dollars. From that alone, one would expect the average price to be creeping up over the years.
This is the area my office is in. Many homes are taking a long time to sell. Many who don't really have to sell have taken their homes off the market. Even if sales start to pick up, there will be a lot of sellers ready to add their homes to the inventory.
The numbers below are for single family detached homes in FMLS area 132. Links to stats for other areas are at the bottom of the page.
Year over year, total transactions increased from 4 to 9 (+125%)
Year over year, average sales price decreased from $2,030,282 to $761,133 (-62%)
All data for graphs is taken from the FMLS statistics put out by Smart Numbers.

For other market areas as shown in the following map, please click on the links below.

All areas combined: Summary of all FMLS areas
Area 13: North Fulton, Alpharetta/Roswell West of 400
Area 14: North Fulton, Alpharetta East of 400
Area 131: Sandy Springs North of 285
Area 132: Sandy Springs Southe of 285
Area 21: Buckhead
Area 23: Midtown/Virginia Highlands
Area 31: South Fulton, West End
Area 33: South Fulton outside 285
Area 81: East Cobb, North
Area 82: East Cobb, Central
Area 83: East Cobb South
Area 72: South Cobb
Area 73: Cobb West Central
Area 74: Cobb West
Area 75: Cobb Northwest
Area 121: North DeKalb, Dunwoody
Area 41: DeKalb, Tucker
Area 42: DeKalb, Stone Mountain
Area 43: DeKalb South
Area 221: Forsyth East
Area 222: Forsyth Southwest
Area 62: Gwinnett, Duluth/Buford
Area 64: Gwinnett, Southwest
Area 161: Clayton County