The reason is because the price is much cheaper than the other options. A couple thousand cheaper per miner is a lot of money if I were to buy 10 miners.
There are many scams out there, but I've found reliable sellers on telegram. Examples are kaboomracks and Minefarmbuy.
So you've bought from them and received the hardware?
Trying to confirm that it's not a scam
Why are you trying to prove it's not a scam? The rule says it's a scam unless it proves it's a reliable site, has delivered mining equipment, and has a good track record, otherwise the site is a scam.
Note that if you scammed, all you have is a username in Telegram that can be changed easily, there is no commercial registration, website, factory, and other things.
Do not search too much, the site is a scam, no matter how positive you get, there are a lot of negative indicators, there are alternatives and there is no need to take risks.