Here is the explination on how cars are evalued in the US by independent inspection agencies. I am pritty sure Unique cars would have adopted a similar format
CONDITION CLASSES
Class One (Excellent):
Almost always a “body off” restoration, or an untouched, factory-perfect, piece that is very close to perfect. All components are either original or appear as new and are fully operational. This car is a top show winner and is not driven, but transported to shows by trailer. This car is almost “one of a kind”. This particular class of vehicle is very rare. The vehicle is completely detailed, including the engine compartment, interior trim, wiring, suspension, paint, and frame. Ideally, this vehicle has been judged with other vehicles in its class and achieved the highest point ratings.
Class Two (Very Good):
This car is well restored with an eye for detail. The interior and exterior show minimal wear, and it runs and rides smoothly. The car is driven very little (maybe 800 to 1,000 miles per year). This class is a slight grade below Class One. A Class Two has not been detailed to the extent that a Class One has been. This class (Class Two) has some evidence of use and wear, although not very much. It is considered “cherry” or “mint”. This vehicle might appear as a Class One until judged against one. It would not qualify as a 95, or better, “point” vehicle. (This class should have no rust on the undercarriage, not even surface rust.)
Class Three (Good):
This is a functional, drivable vehicle in good overall condition needing no, or only minor work. Most vehicles at car shows reflect this condition. This car is what is termed a “20 footer”. From 20 feet, it may look very good. Close inspection, however, would reveal some worn interior trim, and less than perfect paint (worn, and perhaps faded). You may even see some early evidence that surface rust is beginning in the body panels. This car is completely operational and is an “older restoration”. It is driven fairly often, runs great, and is enjoyed by its owner. It is probably a candidate for a full restoration. The undercarriage may display surface rust, and may be in need of detailing. Chrome and trim may exhibit limited pitting.
Class Four (Fair):
This type of car is a fun “driver” with a solid frame and is structurally sound. This car is in need of considerable work. It needs work in and out. Cosmetics, body, and mechanical components all need work, to some degree. It is not a serious collector candidate. Soft floors, isolated areas where rust has eaten through (but not structural), excessive use of Bondo, lots of pitted chrome, glass repairs are symptoms of this condition. Badly soiled headliners, badly soiled and ripped upholstery, rusted out trunks are also signs.