A long time ago I did some volunteer work for a companion bird sanctuary, and the number of people who got a bird as a pet and were totally unprepared for the care required was astounding. Almost all the birds at that sanctuary had some sort of serious behavioral issue because the people who got them just could not keep them cared for. You should probably talk to someone with experience keeping birds before making a decision because experience can be terrible for the bird if you are not ready.
Before you buy one, look up how much replacement parts cost for whatever new machine you are considering. I had to get a new one a few years back because the filter in my old one kept getting clogged, and could not be replaced. You had to replace a larger part that cost almost 200 dollars.