Yeah me too,if it's down Swansea way I'm sure I can help.
The problem can be when one persons idea of "mint" can be very different to another's.
I had this problem once before when I went to look at an astra cabriolet in London,the guy told me of a "slight petrol leak" and that the bodywork was "immaculate".
Popping on an early Sunday morning coach I arrived in hackney at about 10ish,wandered up to the guys house and saw the car.
The "small leak" was in fact a totally split fuel inlet pipe squirting petrol directly onto the engine!!!nice.
Then the bodywork,to be fair no rust or dents but it had been sprayed by stevie wonder on a beach on a windy day!!!
Luckily it cut back ok and I fixed the fuel leak outside his house,but he'd also forgotten to mention a totally dead battery,no dash lights,major powersteering whine and non functioning stereo.
Still,it was so cheap I bought it,fixed the whine by putting the correct zf fluid in,changed a bulb in the dash,binned the standard vaux head unit,battery charged ok on the 230 mile drive home and I drove it round with no probs for a year,shoved a new ticket on it and sold it in the summer for a nice drink.