If you're in the US and planning to purchase the Samsung Galaxy S6 or S6 edge, here's some good news: both handsets are currently being sold at insanely discounted rates on eBay. The Galaxy S6 on offer is an unlocked 32GB T-Mobile variant (should work on any GSM carrier, including AT&T), and it carries a price tag of just $399. For comparison, the device is currently listed on the carrier's website for $580. As for the Galaxy S6 edge, it's a 128GB Verizon variant that is being sold for just $599, down a whopping $300 from its usual price of $899. While shipping is free in both the cases, a "limited quantity" of units are available, so you'll need to act fast if you want to take advantage of any of these two deals. Source 1...
Source: http://www.gsmarena.com/unlocked_samsung_galaxy_s6_and_verizon_s6_edge_128gb_selling_for_just_399_and_599_in_us-news-15550.php