niceminer have provide contact info so directly connect and confirm it's trusted or not 
If you are going to contact them and ask them it's obvious they will tell you that they are legit even if it is not.Really, we don't know niceasicminer was legit site's or not but we read one of guy buying miner from that site and received it.... 
Where did you read? Is it from a trusted site and people?
Even if there is one buyer who bought miner from them it doesn't mean you need to buy look at the whois it shows you it's new and never mention it here before so no one knows here that website exists unless you are trying to promote it? Look at your account it's brand new you just created this account to promote them.