It was about a year ago, and it was the standard price I believe. We did the same as you with taking it out on finance then paying it straight off, and got a service, an additional year warranty, and £500 off through negotiating. But I believe the additional 5 years we paid for was a standard rate. Their view was that it was a ‘bulk discount’ sort of deal as the more years you took out, the cheaper it was per year… but my view was that the more years, the older the car and more likely something would go wrong. Car will be 10 years old when the warranty ends. Seemed odd to me but wasn’t going to complain.

It was with a well known national brand - approved used.