Unmodified? Again we have to agree to a definition. Does that include cars that never had a recall, never had anything replaced or updated like the header tank, fuel gauge sender, fan fail relay, been stored since the 80's in a barn, original tires, struts and all? How about headliners, light bulbs, battery. If you don't count wearable/replaceable parts like tires, struts, and batteries, it would still be a small list. Many changes are reversible, do they count? If you really want to get serious about this you get into Concours territory. Now ask yourself how many cars could compete and the list gets VERY short. Now you are down to a handful of cars. If you consider all of the ones that competed over the years (and over time even some of them are no longer competitive) you are probably talking about maybe 2 dozen. They are the best of the best in #1 condition and even among them some of them are not drivers without doing something to them like rebuilding the brakes or fuel systems or tires. The majority of our fleet of cars that actually work are going to be drivers, not garage queens. Of the drivers most are going to be in #2 or #3 condition. The tighter you make your definitions the fewer cars will make the grade. One reason there are so few cars of concours quality. Also keep in mind it takes a LOT of money to take a car and move it from a #4 to a #3 and even more to go from a #3 to a #2. And another magnitude to get from a #2 to a #1 if you can even do it at all. This is why I suggest to always buy the best car you can afford. It is always cheaper to improve a good car than to try to make a bad car a good car. The more original it is the easier too. Original cars are and always will be worth more than modified cars generally speaking. For instance the gold cars are in a special class (they are "modified").