I live in Argentina, and I want to buy the Creative Cloud Photography Plan.
When I access the page (http://www.adobe.com/la/products/photoshop-lightroom.html), the price is $88,83 ARS, but after I click on Buy now button, price updates to 9,99 USD (which is more expensive than $88,83 ARS).
The country associated with your adobe id must match the store you purchase from and must match the payment address.
change country associated with adobe id - https://helpx.adobe.com/x-productkb/policy-pricing/change-country-associated-with-adobe-id .html
change currency - https://forums.adobe.com/thread/1999694
change store - http://www.adobe.com/store_selector/storeselector.html
change adobe.com website language - https://forums.adobe.com/thread/1999693