Greetings! Welcome to Tezzaworld website, unfortunately you are a few years late to the show as nearly everyone has been and gone, there is still lots of useful archived material to read through, not many active users unfortunately, but that’s the way it goes, hopefully you are not too disappointed...
I'm not expert but I'd always say look everywhere for rust, and just general stuff you should look for when buying any car. Have a search on here and even Google I'm sure I found a list of problem areas when I was buying mine a few month back
Noises from the front suspension, lower ball joints are a common fault. Miss-fire while revving, indicates coil packs are poked or on their way out. Noises from the diff, or power steering pump usually signs that it has had a hard life doing O's.
Other than that, just go for one with a factory airbox over a pod filter.