Not sure many digital cameras would make it 10 years and still be working. Things change pretty fast.
I selected 2010 as that is when I got the camera's that I use most, Canon5D MkII and my GF1. But could have ticked a few of the boxes if not all if I went back to my film days and my eos film bodies first of which was the Eos 600 then the Eos 5 both of which I still own, which would fall into the oldest catagory plus 10 years. Digital wise for my self think it would be by canon G2 from about 2001? which again I still have but does not get any use now.