I'll never ever get a bargain as I can't bring myself to buy from a site that sells stuff too cheap. Generally, the D750 is £1799 at the moment but Panamoz are selling it for £1300 therefore about £500 off.
I may never get a bargain but I have never been ripped off either while adhering to the maxim "If it sounds too good to be true, it probably is".
The one and only time I fell for a cheap deal was when I bought my Nikkor 180mm IF ED as I became convinced that they were a legit camera company. I did get my lens eventually (although it took some time which worried me) and it has worked ever since but it came with no Nikon guarantee card and I have always found that suspicious. When I took a quick look at Google Streetview for the address, it located an industrial unit that looked like it hadn't been used in years, I became very concerned.
I now pay the full price for everything I buy and I buy only from companies I know are legitimate and trustworthy, it is generally worth the extra. Amazon is a case in point, I have had things fail and have received service that can only be dreamed of with other companies. They may not be the cheapest but peace of mind comes at a price.