On September 19th, the iPhone 17 series made its official debut in the market at 8 a.m., sparking significant price swings in the resale sector. Data sourced from the Dewu App revealed that the prices of the iPhone 17 series underwent continuous fluctuations over the course of several hours. Focusing on the 256GB variant of the iPhone 17 Pro Max Xingyu Orange, we observe a notable trend: within the inaugural hour of sales, its resale price took a nosedive from 11,999 yuan to 10,999 yuan, marking a substantial 1,000-yuan drop. This downward trajectory persisted, with the price declining by roughly 100 yuan each subsequent hour. By 3 p.m. that afternoon, the resale price for this particular model had tumbled to 10,600 yuan, leaving only a meager 600-yuan premium over its original price.