Based on the reviews that I see, opinions are quite divided. Some say that it's completely legit and is safe to use, others say that it's a scam. There's one guy who had issues and said that they're legit, but are extremely understaffed: https://litecointalk.io/t/asicminermarket-com-complete-lack-of-contact-with-customer/2819/3
I don't think there is any point in buying from them, when there are that many negative reviews.
The website itself screams scam to me as well, since it is extremely poorly designed. Personally, I would definitely try to avoid this site. Even if they offer good deals, I don't think it's worth taking the risk with them. You're sending an irreversible transaction to them with crypto, once they receive it, you have no control over anything. They're not even located in the US, I don't think, and they're saying free shipping on all products, which is suspicious.