What anonyme said.
I think you owe it to your dog to work through any issues. If it's the fence, build a taller fence or supervise your dog outside. If it's the kids, work on some training and again, supervise your dog and kids. There's not a large market out there for elderly dogs, and by sugar coating any kid issues you're only setting the next family up for failure. If this dog has been so great over the last 9 years, don't you think you owe it to him to work things out?
Sorry to come across as harsh, but two people trying to get rid of their dogs in one day on the WSB, along with two more on my Facebook feed can make a rescuer like me start to see red after awhile. Everyone has an excuse. Everyone seems to think there are an abundance of homes out there. Well, there aren't. Do your dog a favor and work with whatever issue you're dealing with and don't add your dog to the 5 million who will die this year because there aren't enough homes.