The best way to buy a mining setup is to contact a card provider. For example to zotak, asus, gigabyte or MSI etc. They either have their agency branches listed on their websites or you can contact them via their contact details and ask them that from where can you buy their product. They will give you the contact of their agency in your country and you can buy from them. They have their agency all over the world. Who do not scam and if they scam you complaint against them on their website. They will do a penalty to the agency. The agency are third party who have business deal with these companies.