My father was a collector of 1955-1957 Thunderbirds and many other cars from the 50's for 60 years. He went to every car show on the East Coast/Midwest/and Canada. I now have a collection of signs, Oil cans, Old Gas station supplies, gas pump and air pump. I really do not want to sell it but want to know what it is worth. Is there someone, a book or website to guide me through this?