Not sure you have fully appreacited the views on here about the price of that Ultra Yellow GT4. It has the Nismo kit fitted (about £2.5k as an option when fitted new) and given the relative rarity (just 76 in UY out of a total of 176 made for the UK market) the price is a steal, if the car checks out OK. And remember it has the uprated engine 296bhp engine and a distinctive plate always helps. I expect many current UY GT4 owners are feeling a bit depressed to see that car at that price
And in comparison a year older model you are now looking at £10k which I would say is over-priced, I know what I would be looking at. And it is definitely an import with no rear spoiler - who knows, it may been in a shunt with replacement front and rear bumpers
With local members offering to give the GT4 the once over you might wish to think again, albeit your initial instincts were not favourable.