I really loved this site when I first started selling a few years ago. Put up with the insanely high fees because of the ease of the shipping labels. But the customer service has gotten worse, and there is almost no recourse against crazy buyer scams.
I recently sold an item of clothing in flawless condition to a buyer who then tore it in order to send back (strict return policy prevents sending items back unless damaged). Poshmark refused to give me the money from the sale, without any reason for siding with the buyer, despite the fact that I had pics pre-sale. I have a friend who had the same thing happen to her twice. Ruined item AND no money for sale. It also takes them way too long to respond to complaints, if they respond at all. Aside from it not being worth the hassle I'm leaving on principle. Seller beware!