Amazon is ruthless for some product categories, with a lot of competition and thin margins. For you a healthy margin might be 3$-6$, for others they're happy w

Amazon is ruthless for some product categories, with a lot of competition and thin margins. For you a healthy margin might be 3$-6$, for others they're happy with 1$... and Amazon puts pressure for cheaper and cheaper prices to make their users happy, but they refuse to cut their margins :P