For the month of April get our disc brake special...

TIM - one of the easiest ways to market yourself is to create a 12 month plan. Decide what your specials will be or a theme for each month and then use a site like Mail Chip to create a monthly email informing customers. Then run it on FB. FB will probably be your best bet but by duplicating it here on your site you'll be optimizing your reachability and adding legitimacy.