We Are Thinking Of Buying A Golden Retriever Dog Who

We are thinking of buying a golden retriever dog who is 5 1/2 years old and has had two or three litters...is that a good thing that they have been used to breed? She was used to breed and now it is time to retire her so we were interested in purchasing her, but we have never done that. We have had dogs for 30 years, but not really bought one.