A Johnson City food trailer that is known for its Philly cheesesteak sandwiches is up for sale.According to a social media post, the Alley Kat food trailer equipped with freezers, fridges, a flat top grill, deep fryers and more is ready for a new owner.The post also states that along with the fully-loaded 16×20 foot food trailer, the purchase would come with Alley Kat’s original recipes and a month of training.