In my experience over the last three years in Illinois, if the car is a pre-1940 model and it currently has an out of state title, you will receive a letter that will require you to have the vehicle inspected by a law enforcement officer to verify the serial number. He has to fill out and sign the form that came in the letter. You then send that information to the Secretary Of State Police and they will release the title papers and you will get your title. I just called the County Sheriff (I live in a rural area) and once I convinced the lady on the phone that they can do this, an officer arrived , looked at the car, signed the paper and was gone in ten minutes. A good time to call them is on a Sunday afternoon as it is usually a quiet shift. If your car is out of state at a restorer's, the shop can get a local officer to inspect the car and fill out your papers. I have had to do that also, as I did not want to wait for the title until after I received the car. I also have had to actually call the Secretary of State police and ask what happened as they forgot to send the paperwork and my title was held up in never-never land. As for Department of Revenue, ALWAYS buy your car from a private individual and you will automatically pay a tax rate of $25.00 for cars over a certain age, even if you buy a Deusenberg. By from a dealer and you pay 6.25%, and this is where the Dept of Rev can come looking at the reported value of the car. With a private sale their hands are tied. Hope this helps, as I have been down this road recently.