If someone will offer you a price for bitcoin higher then market price, it is a scam! How do you think, why anyone will pay you more if there is no problem to buy bitcoin for market price in an exchange?
It doesn't make sense right? The website is clearly a scam. Why would the people running the website offer high price? Do they want to lose their money? If I were the OP, i'd buy on a well known and well trusted exchange to buy bitcoin at it's lower price and it's safe.