In the state of Maryland, if they put the cost out there, in advertising or website, and they are located in Maryland, then yes, they are legally obligated to have at least one of the product being advertised at that rate. My parents got one of their cars at a great price due to my dad being home on sick leave and looking through the paper while having a late breakfast, and managing to be the first one to that dealer and nabbed that car.
He managed to do that while on sick leave? I hope his boss did not see him out and about.