Show can you know if a web site is safe to buy from?

I have been looking for the cheapest Nikon D7000 SLR camera to buy, this site I found BuyHerePhoto, com has one that is $400 cheaper than everyone else on the net. The site looks good has a 1-800 number to call if you don't want to make your order on line; plus it seems to have a Brick Front Store some where but it doesn't state where only the times and days when they are open. So if any one can please point me to the right place to get the info on this seller that would be most helpful.

I would install the WOT add-on into your browser, it gives safety ratings for sites, and search engine returns, only buy from sites with a GREEN rating. You can get it here, and it will not slow your browser down:

http://www.mywot.com/

You can look up info on the site on: Siteadvisor.com, Safeweb.com, Or mywot.com
Btw a comment on Mywot.com says its a scam site
One more thing you can do is look up the site in google

The store hours are given at the top of home page
I has been also verified by godaddy.com so you can go for it

Even if you could detect if it was fake or not there's not telling or there's no way around people finding loop holes in these sites, personally I never buy things online because there's no assurance, even if there are good comments its not assured that those are real people commenting, purchase it at a store, it may cost a bit more but at least its assured and you have a place to go to if you have any problems with the product.talking on the phone is hard.

Like some has said
http://mywot.com
am not to crazy about avg tool bar site adviser is to hard to get off your pc
norton safeweb get no response from users and checks nothing ( they have fallen from grace like site adviser)