I thought the vehicle has to have a professional appraisal as well.
OK, OK, I'll call.... Been busy keeping track of Benton today!

2500 miles/yr, shows, parades, pleasure rides, garaged, etc. Driving record. Other drivers (none). Submit application with the coverage you are seeking. Underwriter uses various guides to determine stated value. As long as it's reasonable. No 'professional appraisal' as such. If they think not then you are able to submit documentation. Mike can vouch that I have $2000 in just one large part of the engine

. For instance I have not kept a log with all receipts but I have many. Plus I have extensive photo documentation and MANY empty Honda parts bags.
Seems pretty straight forward if you have a collector or expensive restoration.