Class I. New motor vehicles, except those having a cash price of ten thousand dollars ($10,000) or more and used primarily for commercial purposes and except mobile homes and except new trucks or truck tractors having a manufacturer's gross vehicular weight of fifteen thousand (15,000) pounds or more and new semitrailers or trailers designed for use in combination with truck tractors, eighteen percent (18%) simple interest per year on the unpaid balance.
Class II. Used motor vehicles of a model designated by the manufacturer by a year not more than two (2) years prior to the year in which the sale is made, eighteen percent (18%) simple interest per year on the unpaid balance.
Class III. Older used motor vehicles of a model designated by the manufacturer by a year more than two (2) years prior to the year in which the sale is made, twenty-one percent (21%) simple interest per year on the unpaid balance.
Class IV. New motor vehicles having a cash price of ten thousand dollars ($10,000) or more and used primarily for commercial purposes, and except new trucks or truck tractors having a manufacturer's gross vehicular weight of fifteen thousand (15,000) pounds or more and new semitrailers or trailers designed for use in combination with truck tractors, seven and one-half percent (7 1/2 %) per year.
Class V. New mobile homes, such percent established as a maximum finance charge for mobile homes by regulation of the Federal Housing Administration, pursuant to the National Housing Act of June 27, 1934 (48 Stat. 1246), whether or not the mobile home is subject to a sale on credit or loan insured or guaranteed in whole or in part by such administration.
Class VI. New trucks and truck tractors having a manufacturer's gross vehicular weight of fifteen thousand (15,000) pounds or more and new semitrailers and trailers designed for use in combination with truck tractors, ten percent (10%) per year.
69 P.S. § 619