This was changed about 6 Months or so ago, Decatur is also the same way. They are considered just SC's now. Their "sales" staff was either let go or moved to the "Gallery" locations for sales. I think there is also now a Lenox location. (I could be incorrect about that.) This does not mean that you cant not view the SC's as Galleries but there are technically no sales employees at these locations any longer.
In the same way you have to receive you vehicle from either Marietta or Decatur (SCs) and they limit the other locations to sales only.
I was at the Marietta location yesterday dropping my car off for service (again) and some potential customers came in. They told them they had to go to one of the two sales locations (Avalon and Lenox). I asked if they were still doing deliveries at Marietta, and they said they were trying to move all deliveries to Decatur.