Unlike the in-app Map Store, the online Map Store allows you to create a shopping cart and purchase several maps at once. You can add maps to your cart by either clicking the green price button from the map search, or the red Get this Map button from the product details. Once you’re happy with your cart, click the Cart button at the top of the screen to view your shopping cart.
From the Cart screen, once you are happy with your products, click the red Checkout button. From here, check the terms and conditions box, and continue to PayPal to purchase your map. Once purchased, the maps will be added to your Map Store Account!