I used to work for another iste, and my job was to post bad reviews about all the competition sites, so the only way to know for sure is to contact them directly.
If you get a response the site is legitimate and make sure they you do not believe the reviews posted by other sites. it is a way to deter you to go and buy from them
Also ask the site about the other sites, and if you think they are good or bad. if a site says something bad about another competitor then you know for sure the site is trying to beat the competition. A legitimate site will not bad mouth the other sites cos it belives in their products.
