After getting all the numbers right, next, you also need to know what options are available in the car you choose. It can be the available engines, the matching colors, the paint codes, the transmission, etc. Of course you need to know about all these things before you decide to buy a car for investment. It is true that you can ask someone else to do the car authentication for you, but it will not be a smart way to learn about your own investment.
Find as many information as you can about the car you want to buy. Do not hesitate to buy books on cars to learn about classic cars. Do not feel sorry on the dollars you spend for a classic car book. You may lose much more than that if you do not buy one.