To make sure you are buying the right product for your region please check the flag on the page which indicate the region of the product. 

For example the UK flag will indicate that the products are available for the UK region where the US flag will indicate that the product is available for the US customers.

Note that at this moment it is not possible to buy a product in a currency that is not the local currency i.e USD for a UK product.

Flag on the top right corner

. vs

Flag on the product page