United States Used MEGA PACKET. Over 3300 different stamps. This is a great packet for people looking to start a stamp collection, or for a seasoned collector. The item “United States Used Stamps Mega Packet Over 3300 Different” is in sale since Saturday, March 19, 2016. This item is in the category “Stamps\United States\Collections, Lots”. The seller is “ahoskiecollectablesandmore” and is located in Ahoskie, North Carolina. This item can be shipped worldwide.