AI 分析
痛点：二手转卖新手难以判断某件商品是否值得买入、能卖多少钱、需求是否足够，缺乏快速可靠的转卖价值与需求评估工具。
目标用户：二手转卖新手、兼职翻卖者、想进入 reselling 但不懂品牌/市场行情的人。
证据：I just got my first paying customer for something I’ve been building for months. ... You can find thousands of secondhand products for sale, but then what? Is it actually worth buying? What could I realistically sell it for? Will it sell quickly? Is there enough demand? How much should I pay for it in the first place?
变现：订阅制 SaaS，按查询次数或扫描次数收费；免费额度后升级付费；也可对接 eBay/Amazon 等联盟返佣或提供批量库存分析高级版。
MVP：做一个浏览器插件或移动端扫码工具：输入/扫描商品条码或标题，调用 eBay 已售、Keepa、Amazon 等数据，输出预计售价、需求热度、建议买入价和利润空间。
竞品：eBay Terapeak、Keepa、PriceCharting、WorthPoint、Barcode Scanner reseller apps、Zenmarket/代购转卖工具
摘要：发帖者花 4 个月构建 ResaleIQ，并获得了第一个付费客户。产品帮二手转卖新手判断商品是否值得买、能卖多少钱以及需求如何。机会真实但竞争激烈，数据获取和权威比价能力是关键壁垒。