Welcome to the forum Lava.
I've never used that site you mentioned but the prices seem too good to be true. And that may mean they are.
Some unscrupulous dealers will take your order then tell you the camera is out of stock. They'll also tell you it doesn't come with a battery, strap, caps, or anything else they can sell to you. They'll then give you the hard sell on buying those items or even upgrading them and bear in mind, these guys already have your credit card number or money.
I'd steer clear of any place you can't get a personal recommendation for. You may got one for that store here - time will tell.
I'd definitely receommend
B&H. I've used them several times from the UK and can't fault them. I've been in their store a few times too.
Many members here will also recommend
Adorama although I've never used them. I've also heard
KEH.com getting a good mention but again, I've never used them.
When paying lots of money it's better to be sure of where it's going. The 3 I've mentioned would i'm sure be fine. But I'm not sure about the one you suggested.