What to look for when buying an E-series?

[Patsmanpost]

I'm looking at buying a cheap e series (EBII onwards) preferably on gas. Was wondering what to look out for?
Generally, when to the 4L's get tired km's wise?
What areas are prone to rust?
Any other major problems?

I have spotted one with 350k, on gas for $900. Has some front panel damage near A-pillar, might be bent as the drivers door doesn't close properly.

Is there already a thread for this? I did a 2sec search but didn't come up with anything.

Cheers

Pat