Welcome to the forum,
There are little things which make me suspicious. There are no actual pictures of the jerseys, there are Mitchell and Ness jerseys and Reebok jerseys. The wording in the 'about us' section is a little off. Some of these sites are clearly Chinese, this one's grammar is better.
The feel I get from it is that it's a counterfeiter, but maybe someone else has used them and can give some first hand opinion.