I used to buy a fair bit of DA but now only buy from a very very select dealers I've already dealt with. It just seems main dealers are happy to screw over the independents and I just got tired of having my time and money wasted going to collect cars that when you turn up have obvious issues or dmamage that was unreported, DA don't want to know about any issues are are very unwilling to help. My worse experience came from the Vauxhall dealer in hartlepool who advertised a Alfa 159 as all good which struggled to start, leaked oil, had 2 tyres down to cords, paint spilt on the rear leather seats (obviously I left the car with them) and I only got to see the car after hanging around in the showroom for 40 minutes, there was only a service customer and myself in the place. All sales staff were hidden in the managers office and in the end I just walk up and knocked on the door which I was told was rude!!!
Oh and searching DA on the way home the Alfa was relisted with the exact same advert hours later adapted DA assured me they would be investigating. DA just said some dealers are better that others but there's little they could do.