I well recall the wrecking ball being put through some lovely, perfectly serviceable and robustly built aircraft at Heathrow some years ago allegedly at the behest of a certain North American manufacturer. I'm sure those a/c weren't much older than these A320s. (The a/c I'm talking about, incidentally, was the wonderful VC10. The wrecking seemed to have almost been staged so that the public could see it happening, or am I just being paranoid?)
The point is, things aren't necessarily scrapped just because they're unserviceable. Food for thought?
Cheers,
TheOddOne