It's not a matter of arguing. I have posted on many authentication forums, and I believe it's your obligation to explain the reasons for your opinion - this educates the reader and allows them to form their own judgment.
I have offered evidence for my claim that the bag is real, and you should offer evidence for your claim that it's not. It's irresponsible to offer a damaging opinion like this without an explanation.
I will address any and all authenticity concerns and I have already offered in the listing to provide the winning bidder a copy of the receipt including my personal information, so they can verify my purchase directly with Kirna Zabete.
There is not much room for opinion here, as I know for a fact that this is an authentic bag since I purchased it from an authorized retailer. Elliespurse is wrong.
I will also suggest that the reason she refuses to explain her reasons is that she doesn't have any good reasons. The last time she offered her opinion on the authenticity of a PS1, it was based on comparing the bag's photos to photos of a real bag on NET-A-PORTER.
I suggest all readers look themselves - compare my bag with the authentic bag photos on NET-A-PORTER and Kirna Zabete, and then with the fake bag photos on ioffer, and make your own judgments.
I am sure most tpf members are trying to be helpful when they give their opinions on authenticity. I find it very scary that, in this case, the poster is giving an un-informed opinion, and that people might actually listen to her, even though there is no true knowledge behind her statement.