The originals have casings made of gold and their dial is encrusted with real diamonds and other precious stones. The have casings made of imitation gold and they use fake diamonds on their dials. Then again the do not have costly plants and overheads. Most of these websites are maintained by individuals and therefore they have practically no overheads. The same is not true for the multi-billion dollar companies. Apart from that you might have never some across advertisements of in reputed magazines. You will be amazed to hear the rates these magazines charge. Obviously when an ad in any such publication, they do not pay the price from their own pocket.