mate dont know what ur talking about mate.
when buying a car u r comparing it against another. more power is an advantage, thus why he has mentioned it in his add. people asking him about it is because it is out of the normal range so it creates interest.
nothing posted suggests he is lying or bagging him out so lighten up mate.
230kw from 12-13psi on standard turbo is not heard of. i made 205kw off the same turbo/psi and everyone wanted to know about it, let alone 230kw.
if this was sydney id be having a look, but im just interested in the car cause its putting out some impressive power, and want to know more.
good luck with the sale!!!