Combined shipping when purchasing additional cards: Each additional card will be +.50 cents with a 3 card max in a PWE. Example: for a 3 card purchase (Base shipping charge +.50 +.50 = total). 4 or more cards will be converted into a small package with tracking and a flat 5.50 shipping will be charged, not exceeding 25 cards per invoice. Please feel free to message me with any questions or concerns I respond in a timely fashion.