I was looking for a YSL Muse on eBay so I posted the bags I had seen on the Authenticate This YSL area. I saw on that thread that someone had asked some questions about a YSL "vintage" laptop sleeve which to me looked like a large clutch and was posted on Etsy. Once they received info stating it was authentic they did not move on it. I had previously seen that item and had not purchased it for the same reason (? of authenticity) once I saw that it was real and had not been bought ($40! a steal!) I went ahead and bought it right away. Only after did I wonder if this was breaking any form of TPF etiquette. Should I have left it for her, and given that I did not should I offer to resell it (on eBay or something) with prior notice being given to her?