i went to my local farm bureau agent. we have it insured for agreed value ($15K) with no mileage restrictions.
i only had to supply an appraisal and we took a ton of pics. the appraisal was simple, went to a local car dealer and he wrote the value on his letter head.
full coverage = $281.00/year. not sure if it's high or not, but i drive it a lot and don't want the restriction.