Comment by inigyou

Market for lemons, it's called. When it's impossible for the buyer to know the quality before buying, the buyer has no choice but to price the item as if it's always low quality. Otherwise scammers will just sell low quality items at high quality prices and it'll work. But if the buyer is only paying low quality prices, high quality products can only be sold at a loss, and only low-quality products remain in production because they can make a profit.