Buying a sheperd

Question
Our shepard of 15 years passed a few months ago. My husband and I are in our late 50's and would like to purchase another one. I have an offer to purchase a 6 month old female for $800, but with no guarantee at the discount price. We need a loving companion dog that will be good with our grandchildren when they visit. We have a large backyard with an invisable fence (we have never used one before). Questions: is there anything I should know about buying a 6 month old puppy from the breeders?
Question: Do you think we can train a shepard to stay in the invisable fence? We live in a subdivision and children are outside playing in their back yards.

Answer
Hi,  yes the first thing I would ask is why the breeder still has the dog.  Also, I would be concerned with a lot of imprinting issues that are very important the first 4 months including socialization w/dogs, people & children, potty training and also would be very concerned that the dog has not been raised as a kennel dog for the past 6 months of its life as you will have major issues with barking and other confinement problems.  Most shepherds can easily be trained to stay in invisible fencing.
Hope this helps,

Dawn