let it idle for 10-15 minutes - if the exhaust starts smoking, the turbo is ****ed. ask for minimum 1K off the asking price to cover turbo replacement costs (prolly cost more than that)
check engine mounts for excessive wear, signs of fluid leak (our OEM mounts are hydraulic)
rock car back and forth to see if suspension is shagged (it should rock back and forth once, and once only.)
open the oil cap on top of valve cover, chain should *tight*. if there is any movement over 1mm, the chain or VVT tensioner is on its way out. the kit is 600-650AUD, the install can cost between 700-1100 depending on where you go and how experienced they are.
get under the car and make sure the rear drive shafts are still there, and connected to the rear diff.
Also, unless your a mechanic, you should always always ALWAYS get a pre-purchase inpsection done. they cost about 200 bucks, are done by a certified mechanic, and can save you a whole heap of heart ache. if the buyer refuses to allow the car to be inspected, walk away.
2XS 3" intake | 3 Bar MAP Sensor | GTX2867r | 2XS 3" twin dump pipe | 3 port Grimmspeed EBCS | Cobb AP V2 | Purple Drank Tuned