The price of a bag is relatively high, and the materials used must be of considerable value. If a bag is very cheap, although the appearance hasn’t changed much, the quality of the material will surely be reduced, for example, the thickness of the material becomes thinner, the material of the material becomes non-environmental, and so on. But there is always a reasonable range in the price. If a price exceeds this reasonable range, it may be a little bit fishy. A reasonable price can be obtained by comparing the prices of multiple websites, or by selecting a factory with quality requirements.