Online camera shops, especially those based in and around Brooklyn, have reputations. Most of them not so good.
Here is a link to a slashdot article about online camera shop scams:
http://yro.slashdot.org/article.pl?sid=05/12/01/0359252 - you might find some of the comments informative.
Here is a link to a picture of Butterfly Photo:
http://donwiss.com/pictures/BrooklynStores/h0098.htm - note that the same physical location is also "buydigitaldirect.com" and "DigitaleTailor.com." Don's commentary about meeting the warehouse manager DOES make Butterfly appear slightly less shady than some.
Also, a simple google search for "butterfly photo" and "scam" reveals varying opinions on multiple price-comparison sites. Some say good, some say bad. Some of those saying good might be paid astroturfers, or the scammers themselves, if Butterfly is indeed one of the scam shops.
My recommendation would be to give them a call and talk to them - keep your bullshit detector on its highest sensitivity setting - and definitely do not give them any personal information or credit card numbers if the aforementioned BS detector gives even the slightest blip of shadiness.