What is the cost for 1-5 units/packs shipped to Pennsylvania? Is there a minimum amount to purchase or ship?

I have 6 French RCIR Ration de Combat Individuelle Rechauffable" (Combat Ration Individual Reheatable) that i'm selling, dated OCT. 2009. 4 were stored in my house, and 2 in my jeep through 2 east coast summers and 2 winters. I purchased these from a seller in France so they are legit and unopened. ...