I have always wanted a talking bird. I had an African Grey who was great at talking, but he got so mean! I think this was because he was left alone while I went off to work each day. He became so mean, I couldn't handle him at all without being wounded, so I sold him, and the massive cage I had bought for him, for a pittance. I hope he did well in his new home where the owner was home all day.
Parakeets who can talk like this are very rare. Most likely, any budgie I'd buy would just chirp!