That would make way more sense if the average age of a pacemaker recipient was much younger. I don't get the feeling that they'd be eliminating that many units for sale - figure the average age of a first time pacemaker recipient is in their 60s or 70s; you're talking 2 or maybe 3 units in total.

That number rises of course with people who get them much younger (which is the case in my family), but even then you're not talking about a gross amount of units. Maybe 7 or so in a lifetime.