I had the same battle with ICBC several years ago on my 69 Ghia. I gave them several pages of Samba ads, as well as values from various classic car magazines and even the famous \"Gold Book\" (which ICBC themselves used to buy from me as I worked in a store specializing in car books at the time). They still totally low-balled me on the value, and I simply said 'no way' and stuck to my guns. In the end, they sent an independent appraiser to my place of work - at no cost to me. His appraisal was within one-hundred dollars of what I had paid for the car 4 months previously.
Side note:
When I bought this car, I declared the value on the transfer papers at $1200.00. I had actually paid $3600. When the car got hit, ICBC said \"well, then we'll just cut you a cheque for the 1200 and you'll be on your way.\"
\"No,\" I said, \"I undervalued the car on the transfer papers to save money on taxes.\"
\"But that's illegal!
\"Yes, but I'm still not accepting 1200 for this car.\"
ICBC did not report me, and paid to have my car fixed properly.
You are the customer and this should not be your problem. Stand your ground and insist they provide an independant appraiser.