Amazon (and maybe some others) makes early returns easy, but what if you have a problem half a year after purchase? At that point you are dependent on the seller and the warranty. Many of the factory-authorized dealers also sell on such sites and I use those sellers there when I buy on Amazon even if someone else is cheaper, just to know that I have someone worthy standing behind the product.
With most things electronic including dashcams, if you're going to have problems they usually show up rather quickly, from a few days to a few weeks into use. If it makes the first month it's usually OK. I've had to return one cam so far- it died shortly after purchase. The seller had me return it, and sent me another which happened to be DOA. On reporting that they expressed me a new cam which worked wonderfully, I didn't have to send the dead one back.
This is the kind of service you'll never get from a cheap 3rd party seller
Then again I've bought some cheap cams directly from Chinese mega-store sites, luckily none needed returning, but I wouldn't have done that anyway as it's just not worth the hassle. I'll risk small money with those places, but not serious money
![Wink ;) ;)](https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f609.png)
Your money, your choice, but
don't whine if a cheap 3rd party seller you chose on price is useless when you need help-
you have a choice so make a good choice
Phil