No, but they're extremely likely to be refurbished but sold as new. Every phone I've bought off Amazon that was sold as "new" this was the case.

I would be a little bit careful. I don't know if there's a risk of counterfeiting, but I once bought what I thought was supposed to be a US region Moto X2 but instead got a European region one. The most important difference, besides getting a different power adapter, was the fact that there's actually a different wireless antennae chip, where it did not have LTE bands for my carrier in the US.

Thanks! Yes, I checked that using https://willmyphonework.net/ and it says it will work :) I used in the past (it's pretty normal to buy phones when travelling to Europe or US) and it never failed. Bythe way, Amazon seller is Google, it says "By Google", so I should trust it, right?

Personally, any expensive electronics I buy in person, not from Amazon. Best Buy and the like are trustworthy.

Thanks. The problem is that in BestBuy the price is much higher if the phone is new, not refurbished. I found it new on Amazon fora good price. I just checked and it says "Sold by Google", and it goes to a Google landing page on Amazon, so I should be fine, right?

Not necessarily. (1) Landing pages are relatively simple to fake; just because the link goes to Google, it doesn't mean that Google has authorized an account on Amazon to sell the products. (2) Amazon has been known to mix stock, so even if the seller actually is Google, you might end up getting a product from another seller, which might not be authentic.

Personally, the last 3-4 phones I bought off of Amazon were all different models from what they had been advertised as. It's possible that you might get lucky and receive an authentic phone for less than buying from Google directly, but if you actually want confidence that you will receive the real thing, get it directly from the manufacturer.

I just bought a Pixel 2 from Amazon.ca and it seems fine.