It's interesting that Musk thinks they might be able to use the whole thing again (even at a lower level of confidence where they wouldn't risk a customer payload).
There were certain bits that would - without a doubt - have been recycled. The titanium grid fins are pretty much the most expensive individual components on the entire vehicle. A rinse down and recoat and they would have flown again. They are not thrown away lightly.
Everything else is a toss up. Electronics may well be shot (though it was still sending telemetry after splashdown, so some of it was dry). At least one (but probably three) of the engines will have not only been immersed but also suffered significant thermal shock on splashdown. It would be interesting to know what the prognosis is on the other 6. No doubt they're good - individually - for spares if nothing else.
Biting the hand that feeds IT
