Jae, all cameras have a life expectancy in terms of shutter cycles. Each cycle is a click of the shutter button, which opens and closes the shutter mechanism. I compare these cycles to miles on a car or hours on a boat, you are going to get less use out of a high milage car, and less out of a high cycle camera. Chancers are, if he's been using this camera on a day to day basis, it will be "high milage"
Best of luck in your purchasing decison, and oh, BTW, buy Canon