If there is a limited number there is no need to hurry, you are trying to hide a lot of things by making users fooled by the low price and the limited opportunity to make random decisions without thinking.
I heard my friend said that they will close this site
This is additional evidence of scam, meaning that there are no after-sales services, what will happen if there is a problem with the devices?
Why do they don’t accept regular payment methods? Mining devices are not banned from most banking services.
How does your friend get this information?