As said mpg is its grind, but you can get 30 mpg on a careful run. Look out for the usual, accident damage, stonechips on the front can be good, as shows it hasnt been painted. Look out for plastics in the car, can be a bit fragile. Check discs for lips, alloys for kerbing. Clonking/ clicking from driveshafts on full lock. Watch out for insurance hikes from remaps. I went Mountune and got hardly any difference on my premiums. Be careful of bit modded cars, if thats the way you want to go. 300 bhp is a sort of safe margin from damaging block liners, but everyone has their own ideas of safe level of boost and power it can go to. Early clutches ( usually about 2007) are not good with increase in torque. Pressure plate cant take it, so will need an RS clutch to fix it.Enjoy, they are great cars.