Psivage, tell your dad that you can get a much much better workout set for 900. Here are just a few workout benches he could buy for a lot cheaper, and will be a hell of a lot better quality as well as better for your muscles.
http://bizrate.lycos.com/buy/product...h,rf--wgg.html
The one that I have has a bench with flat/incline/decline positions, preacher curl pad, leg press, lat pulldown, and it only cost me 200. For your bar, weights, and dumbells, just go to a local sporting goods store... a lot of them sell used weights very cheap.
Basically, if you have him look into it, it will not only be better off for both of you on a fitness level, but it will also save him about $400
