I got my 360 elite in 2007 and it only failed the day Mass Effect 2 came out (Crashed during gameplay) and due to the error being an E74 error I had it fixed for free and no problems since.
So in all I have had the 1st 360 I ever owned.
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Must be four or five. I have a picture somewhere of two original 360s, one either side of my (at the time) current Elite. Now I've got rid of the Elite and have the 250GB slim. Whether there was another original 360 in the mix along the way, I can't remember.