Your carrier probably wants upward of $700 for the Galaxy S7 Edge, but you can avoid those prices if you don't mind buying from eBay. There's a listing live right now for the dual-SIM GS7 Edge at the low, low price of $569.99. That's even cheaper than the last time it popped up.
The dual-SIM version of the phone is an international model, meaning it has an Exynos octa-core SoC instead of a Snapdragon 820. People seem happy with this hardware, though. It has the same 4GB of RAM, 32GB of storage, and 5.5-inch curved AMOLED display. It also has a whole mess of LTE bands including 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 38, 39, 40, and 41. Whew. However, there's no CDMA and no AWS 3G.
This listing is for a new device in black, gold, or silver. It ships free in the US, but international shipping is an option if you don't mind paying for it. Sales taxes are paid only in Florida.