First of all - the Frye boots on Amazon are a crap shoot.  No matter who the seller is.  Actually, Frye boots are a crap shoot in general anymore.  A previous pair (different style) I got were made in Mexico - and those are the real deal.  Looks, smells, wears like an authentic Frye.  The quality is very good and they 'feel' authentic.  This pair - meh. I plan to keep them because they fit well, it's a nice boot, they look nice and quality is OK. They came in a Frye box with a Frye tag and the underside of the sole is stamped Frye.  No embossed hallmark on the heels tho (like the pair I bought that were made in Mexico).  In other words, they look like the picture depicted here on the Amazon listing. So, in this instance I got what I ordered.  Are they authentic Frye?  The company tells me if they were sold by an authorized seller - they are authentic. BUT (BIG but), I ordered a different style from a different seller (authorized according to Frye) and these were the shoddiest pair of boots made. The difference in quality is night and day.

The lesson here is - if you have any doubts as to authenticity - send them back - unless you're ok with what you paid for them. Will these boots last for as long as a real HTG genuine pair of good old fashioned Frye boots (before they were sold to a company in China in the early 2000s) - nope.
For what I paid for these - they are an ok pair of boots.  Would I pay $300? Never in a million years.