Societies&Zebras -- I worked at PetSm@rt and I can confirm that they tend to lie about things. They generally only treat when it's profitable to do so (though I'm sure there are exceptions. Perhaps there's a store manager out there who genuinely loves animals and sees a value beyond their dollar value. That's possible.)
I have a writeup that explains what typically happens when pets are returned to the store:
http://wp.me/p4JWrl-7D
This situation sounds a bit off to me, as PetSm@rt typically has a vet on retainer. I've never heard of them sending them off site to a specialist, as is typically why you go to a veterinary school.
Veterinary school clinics tend to be extremely expensive, with all the best specialists, making them pricier than most any other animal hospital. But I speak from my experience with Tufts, which is one of the top veterinary schools in the country. Perhaps it's different with smaller vet schools. But you mentioned Purdue, which is a great school. (Though I don't know how their vet school ranks.)
My best guess is that they may have an agreement with the veterinary school to supply sick animals to vet school students for free or low-cost care. That's possible.
Your chances of actually getting her back are pretty remote, I'd say, because the chances of her actually getting treated are fairly remote. It's pretty likely she'll be euthanized, especially if she has something contagious.
If you could do it again, I'd discuss the possibility of treating yourself and getting reimbursed for the meds or seeking treatment from their approved vet, who would then bill them. They typically allow this if you use their recommended vet (often, they'll have an account with the vet, who bills PetSm@rt directly. Lots of humane groups do this too.)
Personally, I would have just treated her at home.
It's a good excuse to get a few of those essential meds. It's always good to have those essential medications on-hand -- antibiotics, ronex, S76 and dewormer. It's just part of bird ownership. They get sick, even with the best care, so you need to be prepared with the right meds when that happens.
Since you did bring her back, I'd keep calling to check up on her. If you hold them credible, I think it increases her chances of survival and actually getting treated. If they don't think anyone cares, there's a better chance they'll just euthanize.
He loves to build nests. However the female stayed at the millet a lot and pecked at it, while puffed up. For the most part though she did hide whatever she had, she was active that's why i had no clue. Thanks. Please answer if i did the right thing, and if i should buy her back. 
