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Hello, Being i cannot afford a new 3gs should i get a broken glass 3gs and replace the glass or a new screen or if the screen and glass is busted or should i get these seprate or get the whole front assembly if they are both broken or should i wait for iPhone 4g

Only if you can get it for almost nothing. The parts are not cheap: http://www.ifixit.com/iPhone-Parts/iPhon… Now if you can get two or three broken ones with different problems and put together one or two good ones, then you could keep one and sell one (or the individual parts on eBay and come out ahead.