I don't stock every item. Check with me to be sure anything expensive or unusual is actually available. The PNC3 is a large and vital group of PNC collectors. Their publication, the Coil Line, is now your best source for new information about numbers found, and varieties. They have classified ads, and periodic mail sales.
Members often hold meetings at large stamp exhibitions.
I recommend you join if these stamps interest you. Tell them ED sent you. It was last updated 12 April 1997.