How to price defective products?

Compare oil-green jadeite bracelets with fair water quality and luster purchased in the past twenty and ten years. How much is the price of a defective jadeite bracelet? The jadeite bracelet had cotton threads, which was a flaw. The price at that time was about 800-1,200 yuan. The very small flaws are mainly cotton wadding; now I have to make inferences based on the standard ground map. First, we push up, 1. Bracelets made of high ice or low glass, the price is generally 500,000-800,000 yuan; then 2. bracelets made of glass. What is the general credit card interest rate? For example, if a low-end jade bracelet has cracks or no cracks, the price will have almost no impact. If it is a jade bracelet worth hundreds of thousands of yuan, even if there is only a small crack, the price may be reduced to several thousand yuan. in addition.