A buyer will usually know whether it is fake or genuine. This happened to me a year ago. I bidded on a handbag after the seller wrote the handbag is genuine and does not believe in replicas & fakes. Believing this, I obviously bidded and hoped to grab a bargain which i did. Little did I know ...I was going to be taken in as a mug. The item arived in a dodgy box in a dodgy dustbox...the type you find when you visit replica websites when surfing the net because of curiusity. The stitching was all tacky and disgusing in comparison to LV's high standard. I was so upset and disgusted that a seller could wrongly do this. If for example they had not marked item as genuine, than fine, that is up to them & I wouldn't have bidded. I got all my money back immediately and as promised I did not report, however I did kindly ask to make sure in future they do not mark item as genuine if it is not. Sometimes if ppl have recieved as gifts, they are quite happy and feel they have been given a real LV, however, they must look at packaging, dustbags, quality, seams, boxes, items...by visiting an LV boutique & then they will know exactly how an expert can spot a fake from a real one! Hope this helps, however, please remember ebay will look at and take these matters very seriously and if found guilty of selling replicas or fakes as genuines can lead to repurcussions.