AI 分析
痛点：卡牌收藏者在送 PSA 评级时无法统一追踪卡牌价值、判断送评是否划算，常因错估评级而亏钱。
目标用户：Pokémon/One Piece/Riftbound 等集换式卡牌收藏者与送评玩家
证据：I was losing money on Pokémon cards because I kept sending in cards that weren't as good as I thought they were... I had no idea which cards were even worth sending in the first place so I was just guessing and losing money.
变现：订阅制（免费追踪少量卡牌，付费解锁无限卡牌/PSA 批次追踪、历史成交价、评级预测与 ROI 分析）；affiliate 导流到评级/交易平台。
MVP：2 周内做一个仅支持 Pokémon 的 MVP：手动/CSV 导入卡牌与 PSA 批次，抓取公开成交价，计算当前价值/送评 ROI，并加入简单的评级猜谜反馈。
竞品：PSA 官方 App、Collectr、Ludex、Card Ladder、GemRate、130point、TCGplayer App
摘要：发帖人因送 PSA 评级时常错估卡况和卡值而亏钱，于是做了 JK Index，用于追踪送评中的卡牌价值、参考真实成交价，并用“Before the Slab / BTS Blitz”猜评级游戏帮用户校准判断。目前没有收入或明确付费请求，早期发帖也未获得反馈，需求有待验证，但目标用户和痛点较具体。