估价怎样更公平？数据安全咋保障？改装机怎么防范？买卖二手手机 如何更安心（经济新方位·二手交易市场观察）

Core Viewpoint - The second-hand mobile phone market in Shandong is experiencing growth due to the implementation of the old-for-new consumption policy, which includes subsidies for mobile phone exchanges, leading to increased transaction volumes and market activity [2][6]. Group 1: Market Dynamics - The second-hand mobile phone market is seeing a rise in the number of devices available for circulation, with a significant increase in recovery orders since the policy's implementation, with over 40% growth in recovery orders for mobile devices in the first five months of the year compared to the previous year [6][11]. - Major sources of second-hand phones include mobile operators and brand stores, accounting for 70% of the supply, while the remaining 30% comes from individual sellers [4][5]. - The demographic purchasing second-hand phones primarily consists of young individuals aged 18 to 34, with a notable presence of delivery workers, students, and young professionals [5][10]. Group 2: Consumer Behavior and Concerns - Consumers express concerns about the potential for price discrepancies during the evaluation of their old phones, as well as worries about data privacy and the effectiveness of data wiping processes [7][10]. - A significant portion of consumers, over 90%, are hesitant to sell their old phones due to fears of privacy breaches, preferring to keep or physically destroy their devices instead [10][11]. Group 3: Industry Recommendations - To enhance market trust and transparency, it is suggested that the government establish third-party evaluation agencies for second-hand phones, implement policies to combat the sale of refurbished devices, and promote internationally certified data wiping technologies [11][12]. - The potential value of idle mobile phones in China is estimated to exceed 600 billion yuan during the 14th Five-Year Plan period, indicating significant untapped market potential [11][12].