Mistake One: Buying only the expensive, not the appropriate. Due to the complexity of renovation materials in the market, there may be hundreds or even thousands of brands for the same product, with prices varying greatly. Take a double bed for example, the price range can be from hundreds of yuan to hundreds of thousands of yuan. It's difficult for consumers to differentiate, so they use price as an important criterion for purchase, blindly pursuing high-end quality and only buying the most expensive items.