GEARBEST and Fake shipping costs? can someone explain why this is?

http://bit.do/bZXbJ Secret page for discounted GearBest gadgets
Gearbest is charging us more for there Quads with fake shipping costs How can Banggood charge the same price with free shipping, they both ship from China. Gearbest claimed that it was my postal service that was claiming these extra costs, so why does Banggood not have the same problem.