All flagship phones tend to get better and better prices the farther out you get from the release date, but Samsung's latest crop seems to be dropping in price especially fast. For example, one eBay merchant is offering a 32GB Galaxy S7 Edge Duos for just $649.99, a solid $150 off the retail price (or much more, depending on where you buy it). That's even better than the aftermarket price for the same phone just a couple of weeks ago. The seller is based in New York, but this particular phone is being sold with a UK-standard phone charger, so you'll need a spare one to use it.
This particular S7 Edge Duos (AKA dual-SIM) is gold, 32GB, and new, so it should have a full Samsung warranty. The seller will ship for free to the United States, and for an extra fee to the following countries and territories:
Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech Republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, China, Sweden, Korea, South, Indonesia, Taiwan, South Africa, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Russian Federation, Israel, Mexico, New Zealand, Singapore, Switzerland, Norway, United Arab Emirates, Qatar, Kuwait, Bahrain, Croatia, Republic of, Brazil, Costa Rica
The dual-SIM option is popular for travelers and users in poor cell service areas, but be aware that the second SIM slot is also the MicroSD card slot, so it can't be used for two SIMs and expandable storage at the same time. It appears to be selling quite fast - all other colors are already sold out - so get an order in quickly if you want one. Orders outside of New York and New Jersey won't have to pay sales tax.