I totally agree with you. We really need to do our homework/ research and teach our self to be a smart buyer. What I do whenever I have doubt of the item authenticity is to sleep over it, for few weeks. After a month or two, check again see if the seller still around, do background check in the mean time. Like in LYN it's kinda easy, because good seller who built up good reputation can be easily seen in their sale thread. If you still in doubt, just let it go instead of gambling your money for something not certain.