Thanks all. I have just written to them again, quoted the current ads, my ad from Dec 2014 when I bought it, plus confirmation from dealers of what was paid for the last three known to have changed hands. I do believe the 5.5 is low, as the current average is around 6 to 6.5k. but that is what I stated as the market value when I took out the policy so personally I can't quibble too much about that. I have asked them to source me a suitable replacement instead of their cash offer, won't hear back now until Monday or Tuesday I would think. I am quite prepared to wait this out, though I want the car under cover sooner rather than later. I will update as and when I hear something.