Prices have leveled out considerably. Sellers think they are rare and overly valuable and will price them through the roof then find out they are not overly valuable or rare and bring the price down to a reasonable amount. The year of manufacture makes no difference in the value. Some people will pay a premium price to get a machine that was made the same year they were born and others my want a centennial machine. Other than those 2 factors, there are all no other value determinations, beside condition, from 1933 to the end of production.