The Samsung Galaxy S6 Edge was announced back in March of 2015 and was the first smartphone from Samsung with dual curved edges. It is and was a game changer. It sports a 5.2-inch 2560x1440 resolution display, powered by the Exynos 7420 along with 3GB of RAM. There's also 32GB of storage inside for your apps, games, videos, music and pictures. And right now, eBay is selling it for just $489. This is an unlocked version, however it does come with a UK adapter. So you'll need to use your own adapter if you are not in the UK. At the time of writing this, it is available in both white and green. The green actually isn't officially sold here in the US, and it's a great color on the Galaxy S6 Edge.
If you're looking for a bit more storage, but don't mind the Galaxy S6 Edge being manufacturer refurbished there is an AT&T 64GB variant of the Galaxy S6 Edge available right now for $439. A great price, and even though it is refurbished, you still do get a warranty with it. So if anything should happen, you're still covered. That's a great piece of mind to have, especially when you're saving some extra cash.