Local VW Dealer wanted 24k for a year old 9k miles ex-demo ED30 and wouldn't budge on price... I went to a Car Supermarket and bought the same car less DSG (I wasn't bothered), a year's warranty and xenons (not too bothered either - had them on a few cars but only found them to be significantly better than decent conventional bulbs on the Jag) but brand new (7 miles) for £17,300...
Got the same trade in on my Jag too...
The sales guy at the dealership didn't phone with his best and final until a day after we'd agreed that he would... when I told him what I had done he was gob-smacked... and told me that, frankly, I'd done the right thing...
Now six months and 19K miles on... I'm still happy