B&H are great. I've had good luck with them. My main supplier these days is Best Buy. No 3rd party sellers. Never heard of any scam or inauthentic products from them. They ship from the local store or warehouse so I get things faster than Prime. And maybe they treat their workers better than Amazon? I guess that's a low bar to clear but I haven't heard any complaints.
It's a little funny to me because as recently as the early 2010s, Best Buy felt like a joke. I don't know that they've changed much from then to now, but Amazon and Newegg are shadows of what they used to be. Best Buy seems like a paragon of reliability in comparison.