Thanks for all of this, the model I am honing in on is a diesel Manual model, was serviced last May and had all of the above filters you mentioned changed along with the oil, which I have already seen photo evidence of. The surprising bonus is that one of my employer's customers, (I work in the paint and bodyshop consumables supply industry,) is actually the garage that has carried out the previous 4 services, so a quick phone call this afternoon confirmed he knew the car well and confirmed the owner is meticulous when it comes to his cars, (he owns a very nice Nissan I am told). It had a replacement clutch in December, the old one was worn but still had many more miles left on it supposedly, also had new discs and pads around a year ago which i'll see on the paperwork tomorrow when I view it in person. I need to check the status of the timing chain as that is due in a year/20,000 miles, but other than that, this may be the cleanest one I can find for sale. The fact it is in the same city is another bonus, but I was prepared to travel for the right vehicle so not a deal clincher by any means.