I was given a "free" Orange Wing Amazon almost 16 months ago. She came to me so ill the vet wasn't sure we could save her. She had Asper in her air sacs, an upper repository infection, her liver and kidneys were shutting down, she had lead poisoning from being in a rusty wrought iron cage, she was on a HORRIBLE diet of only Cockatiel seed, sunflower seeds, and peanuts, with whatever human foods they were eating thrown in for good measure (didn't matter if the food was good for her or not)
I think at one point I had tallied up all the vet bills, medications, detoxing, new cage, toys, and other things for just the first 3 months I had her and it was well over $3000.00 I drained my savings account and maxed out my credit card to save her life. And that doesn't even begin to describe the nights I spent in my recliner next to her cage crying and praying and hoping she would pull through until morning so I could have 1 more day for more meds to have time to work and good foods to have time to help her.
She did pull through, and is a WONDERFUL amazing companion now, completely healthy & happy. I don't regret one single dime spent on her then or now, but my point is...
Free is not FREE, free can mean thousands of $$$, I had no idea what I was in for when I said yes to that phone call, but I had the means, and the will to do whatever it took to give her the chance she needed. And I would do it all again tomorrow.
I'm not saying you shouldn't get a parrot, what I'm saying is if you can't or won't spend the money to get one from a reputable place, what happens if the one you get is ill and needs thousands of $$$ in vet care and medications? It's something all parrot owners have to think about and be as prepared as we can for. Parrots aren't cheap to buy, care for, house or keep healthy. Maybe your best bet would be to get in touch with a rescue and "adopt" one that needs a home, at least coming from a rescue (if it's a reputable one) the bird has been to an avian vet and has been determined to be healthy and ready for adoption.