I'll never buy any designer stuff on there ever again.
i don't think you have to never buy any designer stuff on there ever again -- i think you just have to do your due diligence. we make the mistake of thinking that "legitimate"/non-second-hand sites are somehow better at authenticating designer merchandise, when in fact they probably don't bother authenticating anything at all -- they just buy from reputable sellers/suppliers. i honestly would just double-check everything not purchased directly from a boutique with the girls here, because i've seen fakes at places like nordstrom and neiman marcus (most likely a situation where someone purchased something and returned a fake, and the saleperson who processed the return didn't know it was a fake -- why would they). i mean, i have literally saw a dress once at nordstrom with the tag "docle and gabbana."
edit: that said, i'd be very cautious of buying something from myhabit that wasn't returnable, just in case.