I'm not making a nationalistic comment. I'm just saying that experience has been better than my experience with American dealers/sellers.
I am not an "American Dealer" so I don't know how that feels, but I am pretty sure some of them will be offended by this statement, but hey, this is a free forum, you can say whatever you want.
I've dealt with a lot of different companies for a lot of different businesses over the years and have never encountered the scammers that exist in this "industry".
This is because Cryptocurrencies are not governed, it is way more convenient for scammers to receive a crypto coin rather than a wire transfer, so that's pretty normal.
I've even found that manufacturer's sites can't even be trusted. Looking for Obelisk's site I found another site with Obelisk as part of the domain name. It even looked better than the official site.
Google and all those domain providers are the once to blame, I have been sending complains to Godaddy to take down some of the domains they sold to scammers, I provided all evidence that those sites are fake, they haven't done anything about it.
Anyway, it's always best to come to this forum and ask for the official domain/website of any mining manufacture you want, you will find everything you need here, all you need to do is search this section and if you can't find an answer just make a new topic and you will get all the answers you need.
Good luck.