no paypal
no foreign mailing
buyer pays postage
pricing row-1-- chip-1--$7/ chip--2--$5/---chip-3--$5/--chip-4--$7
----------------2--------1--$5/ chip--2--$15/--chip--3--$5--chip-4--$5
----------------3--------1--$5---------2--$7/---------3--$7--------4--$10
----------------4---------1--$5/-------2--$5/--------3--$7