Sorry to take so long in getting back with you. To answer your question, yes, Car Demon can split new and used into separate pages. All you need to do is make sure you set the vehicle condition and then you can visit;
Here's some more info from the F.A.Q. on different ways you can 'categorize' your inventory.
Does Car Demon use taxonomies for categorizing vehicles and how can I leverage that?
Yes, Car Demon uses several custom taxonomies; condition, body_style, vehicle_year, make, model and location. These can be used to create pages containing vehicle categories, for example; Let's say you want to provide links to all the different body styles, to link to all of the coupes in inventory you would create a link to http:/yoursite.com/body_style/coupe to link to all trucks it would be http:/yoursite.com/body_style/truck. You can use the same logic to leverage the other custom taxonomies as well.