We have same situation here on German Amazon: several (3-4-5) different US companies are currently selling new genuine Pebble watches, the prices are equal or very similar, and very low.
I’ve ordered several watches: Pebble Time, Time Steel, Time Round, and Pebble 2 HR to compare and to choose one or even several. They all were new and genuine. I kept the Pebble 2 HR (and even ordered the 2nd, in different colour) and returned the rest. Absolutely no risk because the orders are being fulfilled by Amazon.
So just do it