How much does this cost to the nearest dollar?

SatPhoneStore Iridium GO! Prepaid 400 Minute Sim Card Ready for Easy Online Activation
The Iridium Go! Prepaid Airtime SIM Cardcan be used anywhere in the world. Validity period can be extended by adding more minutes prior to expiration. READY TO ACTIVATE Includes Iridium GO! sim card preloaded with 400 minutes valid for 6 months after activation. Instructions inside. WORLDWIDE COVERAGE Iridium is the world's only truly global mobile satellite communications company, with voice and data solutions covering every inch of the earth's surface. Reaching over oceans, through airways and across the Polar Regions. UNPARALLELED REACH & HIGH DEPENDABILITY Powered by a uniquely sophisticated global constellation of 66 cross-linked Low Earth Orbit (LE

Price is $539.00

Price: $539