Our factory is taking long-term cooperation, not to say that we will stop doing business once we sell it to you. I believe you got our lowest ex-factory price. If you find something lower than ours, I'll pay you back ten times. The price of our products is a little higher than that of ordinary products, because our products can not only guarantee invalid refund, but also guarantee you. If you can't sell it, you can return it for a refund at any time to solve your worries.