I am assuming you are roughly the same age as your friend. Just remember that this is not an animal that can easily be brought with you on vacations, it can limit your choice of dwellings and even careers, and you will either be stuck with it for life, or have to hand it off to yet another owner, which really isn't fair to the bird.
This is not the kind of commitment I would want to start life with. Don't jump at it just because of price. When the price of a new one is right, you'll have put down enough roots to realistically know if you can handle this kind of thing. Besides, if money is a major concern then what will you do about vet bills, food, etc? People are already advising you that what is best for the bird (a bird companion), and you are already saying you can't provide this for the bird because of financial concerns.
I'm not trying to be a grouch or burst your bubble but this does not sound like a good idea.