Country Category
Country Category 1
Australia, Bahamas, Bermuda, Brunei, Canada, Cayman Islands, Falkland Islands, Gibraltar, Guernsey, Hong Kong, Iceland, Isle of Man, Israel, Japan, Jersey, Kuwait, Liechtenstein, Luxembourg, Macao, Monaco, New Zealand, Norway, Oman, Qatar, Saint Martin (Dutch part), San Marino, Saudi Arabia, Singapore, Switzerland, United Arab Emirates, United States (US), United States (US) Minor Outlying Islands, Virgin Islands (British), Åland Islands
Country Category 2
Andorra, Antigua and Barbuda, Aruba, Austria, Bahrain, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Equatorial Guinea, Estonia, Faroe Islands, Finland, France, French Polynesia, Gabon, Germany, Greece, Greenland, Guam, Hungary, Ireland, Italy, Latvia, Lithuania, Malaysia, Malta, Netherlands, New Caledonia, Panama, Poland, Portugal, Puerto Rico, Romania, Russia, Saint Kitts and Nevis, Saint Pierre and Miquelon, Seychelles, Slovakia, Slovenia, Spain, Sweden, Taiwan, Trinidad and Tobago, Turks and Caicos Islands, United Kingdom (UK), Uruguay, Virgin Islands (US)
Country Category 3
Angola, Argentina, Armenia, Azerbanijan, Barbados, Bangladesh, Bolivia, Bouvet Island, Brazil, British Indian Ocean Territory, Burkina Faso, Burundi, Cambodia, Cameroon, Cape Verde, Central African Republic, Chad, Chile, China, Christmas Island, Cocos (Keeling) Islands, Comoros, Congo (Brazzaville), Congo (Kinshasa), Cook Islands, Costa Rica, Cuba, Curaçao, Djibouti, Dominica, Dominican Republic, Ecuador, Egypt, El Salvador, Eritrea, Ethiopia, Fiji, French Guiana, French Southern Territories, Gambia, Georgia, Ghana, Grenada, Guadeloupe, Guatemala, Guinea, Guinea-Bissau, Guyana, Haiti, Heard Island and McDonald Islands, Honduras, India, Indonesia, Iran, Iraq, Ivory Coast, Jamaica, Jordan, Kenya, Kiribati, Kyrgyzstan, Laos, Lebanon, Lesotho, Liberia, Libya, Madagascar, Malawi, Maldives, Mali, Marshall Islands, Martinique, Mauritania, Mauritius, Mayotte, Mexico, Micronesia, Moldova, Mongolia, Montenegro, Montserrat, Morocco, Mozambique, Myanmar, Namibia, Nauru, Nepal, Nicaragua, Niger, Nigeria, Niue, Norfolk Island, North Korea, North Macedonia, Northern Mariana Islands, Pakistan, Palestinian Territory, Papua New Guinea, Paraguay, Peru, Philippines, Pitcairn, Reunion, Rwanda, São Tomé and Príncipe, Saint Barthélemy, Saint Helena, Saint Lucia, Saint Martin (French part), Saint Vincent and the Grenadines, Samoa, Senegal, Serbia, Sierra Leone, Solomon Islands, Somalia, South Africa, South Georgia/Sandwich Islands, South Sudan, Sri Lanka, Sudan, Suriname, Svalbard and Jan Mayen, Swaziland, Syria, Tajikistan, Tanzania, Thailand, Timor-Leste, Togo, Tokelau, Tonga, Tunisia, Turkey, Turkmenistan, Tuvalu, Uganda, Ukraine, Uzbekistan, Vanuatu, Vatican, Venezuela, Vietnam, Wallis and Futuna, Western Sahara, Yemen, Zambia, Zimbabwe
The reasoning for a lower price in certain countries is fairness to follow that country BNP (or similar value). Unfortunately, also, we need to comply with European Union rules and regulations regarding there must be the same price in every EU country.