RAC tried pulling the, your car has reduced in value to 12.4k to me about a week ago with '' agreed value'' after a half hour conversation was renewed back to 15k flat. Most of the time the ''agreed value'' they send you a letter for is just what they see it's agreed to via the reports they look at. If you don't agree with it, call them and argue your case, most times they'll either change the insured value to what you want, or closer to what your after.