Hmm, Chanel do not retail online, nor do they allow companies to do so.
I don't personally believe they are authentic as they only show one poor quality, seen it a million times before picture.
I'm not sure of the deal with Chanel factory seconds, but I can't imagine Chanel sending them off to another company to sell cheap online.
I can't see how the company would have got hold of the bags. I think if they were genuine, perhaps Chanel would have a link to them on their website (which is very poor quality and always a tell-tale sign) but they don't.
However, this is just my opinion, I'm sure the others will have more info.