what i or any other board members think is "fair" won't affect your final disposition of payment. arm yourself accordingly with accurate and recent "book price" figures available from various online sites as well as any recent documented sales you can locate on a comparable XB. your insurance company typically could care less about improvements....accessories...add-ons....goodies installed. a tried and proven approach on your part is "retail book price" and add 10% onto that for any accessories or improvements....and low mileage if that was the case. the insurance company rebuttal will be either wholesale or "trade-in" value which are one and the same. after some arguing they may agree to split the difference. your strong suit is documentation, research, pictures, recent verifiable sales. present that evidence along with a strong argument in your favor and you'll get the maximum amount.