Ala. Code § 40-12-169: Tractors, Road Machinery and Trailers.

Each person, other than a licensee under Section 40-12-51, for engaging in the business of dealing in tractors, road machinery or trailers, shall pay the following license tax: In cities and towns of 50,000 inhabitants or over, state license of $50, county license of $40; in cities and towns of 25,000 and less than 50,000 inhabitants, state license of $35, county license of $35; in cities and towns of 5,000 and less than 25,000 inhabitants, state license of $20, county license of $20; and in all other places of less than 5,000 inhabitants, whether incorporated or not, state license of $10, county license of $10.