The OnePlus 6T is in the rumor mill right now with a possible release set for November, but that doesn't mean the company is focusing only on the unreleased model. Right now, there's an ongoing bundle sale, with which OnePlus is looking to sell some extra OnePlus 6 handsets ahead of the 6T launch. Probably wants to clear the stock. The "Tough and Smooth Bundle" gets you the 128GB Mirror Black model for 569, a Karbon or Sandstone Case plus the Bullets V2 buds. However, the so-called "Full Survival Kit" is more appealing as it offers the standard 64GB Mirror Black version for 519 and...
Source: https://www.gsmarena.com/oneplus_is_offering_sweet_bundle_deals_with_the_oneplus_6-news-33135.php