Here is the cost of one pair of sunglasses shipped to 63123 in a recycled, light weight box with shredded paper for shipping protection. This is the safest, cheapest way I can ship. One pair: Mailing Summary Price First-Class Mail® Parcel $3.34 USPS Tracking™ No charge Total $3.34
Then if you win both pair: same shipping procedure with the light weight box and shredded paper for packing material. Would be: Mailing Summary Price Online Price First-Class Mail® Parcel $3.34 USPS Tracking™ No charge Total $3.34
Well, looks likes it's no cheaper for two than one. I'm not going to even try to put them in a padded envelope because they would get crushed and that would be no good :(