Today I realized that the warning expressed in numerous Yelp reviews is legitimated: this afternoon I stopped by at Plato's closet and brought two large bags full of new clothes to sell.
While I was browsing the store I watched the girl checking my stuff. She put some items on the counter while other pieces she picked got dropped behind the counter. Well, in retrospect I should have checked my bags before leaving the store for the clothing that got dropped behind the counter:
Back home I reorganized my stuff and realized that at least 5 expensive items were missing (Abercrombie & Fitch dress, French Connection shorts, floral romper and two lace dresses). And there is probably more missing. I certainly won't go back!