Choosing Your Bird's Cage is the most important item!
So choose VERY carefully!
Trust me, I went through just the idea of an extremely affordable, small, and simple "Parakeet Home" from the Wal-Mart, but that just wouldn't cut it, sure it came very affordable and it came with 2 perches, 2 food bowls, and a swing BUT for one thing, the perches were very small plastic perches, so his feet couldn't get much exercise because...The cage was too small to fit any other perches! And he was only a few months old, but too small for the swing, which took up most of the cage anyway, and think about it, REALLY think about it, when your buying a cage for your bird, your bird is NOT going to be the only thing in there! And Parakeets love toys and they love to play, so they will need more than a swing to keep them happy.
Try to find a cage with a tray at the bottom for easy cleaning so you don't have to put your hands in the cage to clean it, just pul it out and change the papers or litter.
Below are some examples of the typical "Parakeet Home" and the right size cage.