The first ever budgie I had came from a breeder and she was wonderful.
She explained so much about what we needed to know and also was willing for us to call her any time with questions. She taught us a great deal about budgies.
We had a few more budgies over the years, another from her and a couple given to us from people who didn't want them anymore. We even had a psychobudgie who attacked everything it saw - given to us by its owners who couldn't take it anymore!
Then as an adult I missed my budgies and got another one. My husband was going on a business trip and bought me a budgie to keep me company bit he got it from a petshop and they told him it was a baby when it was actually an adult. He had NO CLUE how to tell the age of a budgie so he believed them even though the cere was dark blue and well aged. Oh well...
Poor budgie only lived about 6 months - I think it was an old fart before some gullible person came along to buy it.
I have visited many pet shops - most of the time they try to sell you an old budgie and tell you it is a baby. I have occasionally bought a baby budgie from a pet shop but I would definitely prefer a breeder. I just wish I had known about this site before my son bought himself a budgie last year because I would have preferred to get a baby from a breeder and I could at least have asked around.
He did get a sweet little pet and he loves his budgie very much (he has 2 now thanks to unforseen circumstances and Caren's generousity) but I have tried buying both from breeders and pet shops and I have to say - the skill and experience of a professional and good breeder is streets ahead of the "customer service" you get in a pet shop staffed by partially trained teenagers.