Check out Green Acres Outdoor Living in Marietta.
I don't know what their prices are like, but they have a bunch of different play sets to choose from. They have a bunch of them set up for you to look at and test if you want. They're located on Cobb Parkway/hwy 41. Just north of the 120 loop. They also sell outdoor furniture, gazebos, etc.
http://www.greenacres.info/store/?catalogid=936