Back in the day, Harters pans went for $3 and the kits: Royal Rodent and Regal Raider were $7 and $8.
The Raider, designed for 29 proto speed, made a better rat than the Rodent, due to 125 squares vs 80.
The Student Prince and Count Clippers were very bad and unpopular products.
The pans have become a rare and costly find for the builder or collector. A Harters pan is not something that can be knocked-out by a laser cutter or plastic printer.
The Count Clipper, while cool, has under 300 square inches of thin airfoil and a lot of weight. The upside would be good top speed with a powerful engine.