She's a lovebird - and you just have to look around your area for lovebird breeders - you want one that's been hand raised, and you do NOT want a pair - a pair will bond to each other and not to you.
Prices vary - depends on who you get them from. I paid $50 for Nugget at a bird show, but there's a breeder in NC that I want to get one from who charges $150, and I'd be willing to pay that, because of the way that they raise their babies and the fact that theirs are fully vetted before they ever go to their new home.
I adore Nugget - and I got really lucky with her, but if I were starting over, I'd probably choose the more expensive breeder (True Love Aviary if you want to Google them) just for the peace of mind of KNOWING I was getting a healthy, well adjusted bird. The way that I got her was luck of the draw, and I came out on the winning end - luckily.
Also keep in mind that it's a lot of work to get them to build their trust in you - it took a good month before Nugget trusted me enough to even take a treat from my hand - but once you make that breakthrough, there's nothing like that relationship!