The international variant of the Samsung Galaxy S8 is currently available at discounted rates in the United States. Specifically, the unlocked variant with model number SM-G950F is being sold for $689.99 on eBay. The deal is being offered by retailer fashionlife786, who is already offering a decent discount on the international Galaxy S8+ as well. Among other third party retailers, Amazon is selling the same S8 model for $770, while B&H has it listed for $799. The Galaxy S8 units that the eBay retailer is offering are Americas region locked, and only compatible with GSM networks....
Source: http://www.gsmarena.com/unlocked_samsung_galaxy_s8_international_variant_available_for_690_in_us-news-25037.php