It's the 06-07 XT that has the propensity to show Fault Codes #1410 & #2432
I don't think the 04 has those issues via the air pump leading to corrosion in cylinder 1.
In any case, if 3 cluster lights stay on, it's an expensive fix.
I'd ask the owner to allow you to check this Foz over at Pulse Racing if it's near Sydney; Paul will give you an unbiased check.
I think the timing belt, tensioner and water pump have been done at 100,000Km eh? On the 06 onwards, that's due at 125,000km.
X-Force can drone on some cars. Keep the test drive steady at 80, 100 & 110 to check droning.
The paint is thin on Fozs. The leather is thin on Fozs.
Electrics are usually good.
Longevity is good
Breakages occur a lot when modified in the engine and then stressed - even on running gear/diff
Good resale value, although $16K for this is at the upper end.
If you're in Sydney and so too is the car, you're welcome to drive mine for comparison.
I'm on iPhone at the moment, so I can't tell where you are.