I need to purchase 4 airline ticket for my family to visit my father in law. It will travel during Christmas. So far, the lowest price I see is w/ Northwest Airlines. I just went on Ebay and saw many sellers are selling an NWA E-Cert coupon code for additional money off fare purchase off NWA website. I recalled that these certificates are mailed out randomly. Anyone received them and have no plan for them please PM me. Thank you.