Plato's Closet review: Buying clothes

I have gone a few times to sell items and I'm always sent back with what I brought in. Occasionally they'll buy something for a dollar or two. I brought 3 pairs of shoes and 2 purses in today. One pair of shoes was almost new and very much in season. I decided to walk around the store today as they did my buy. I saw similar shoes on the racks for $40-50 and many of them were very worn and even dirty. When I questioned why my items were rejected when they clearly had items for sale that looked way worse. All I was told is sometimes the buyers make mistakes. I feel it is 100% a race issue. If they are buying worse items from other people, why wouldn't my same item be able to sell especially since it's in a way better condition. None of it ever makes sense. Are items only preferred if they come from someone who is Caucasian?