Why did you don't buy a playstation 3? thats good english.
Do you mean "Why did you not buy a Playstation 3"?
Well if thats what you meant then i wouldn't have entered the thread because I do own a PS3.
Or if you mean "Why did you buy a PS3"? Then my answer would be because I like the Playstation brand and it has the best exclusive games and great 3rd party games.