I'd like to score a burned out N900 for spares, mainly LEGIT housing parts, not the cheap cloned plastic junk on ebay.

But, from my experiences, the little thing is pretty resilient. I've had NO issues - EVER - running mine every single day with a 250MHz lower / 1150MHz upper threshold, slightly volt tweaked (250:26 up to 1150:70), smartreflex off, ignore nice load on, up_threshold at 80 and the sampling rate turned up to 200000.

Very fast clock scaling, very fast sampling, saves a good deal of battery... plus it barely ever gets warm (only when charging).

So, to sum it up, good luck seeing a dead N900 for salvage that was made dead by overclocking alone. You'd have to do a lot more to kill it.