From her red-roofed home near Papua New Guinea's capital of Port Moresby, Isabelle Dikana Iveiri overlooks a giant plant used by Exxon Mobil Corp to liquefy billions of dollars' worth of natural gas before it is shipped to Asian buyers.

SVM Gift Cards via eBay offers a $50 ExxonMobil Gift Card for $46 with free shipping. That's tied with our April mention, a savings of $4, and the lowest price we could find.