Architecture
Role-based guidance for marketplace participation. Load relevant file based on user's role.
CODEBLOCK0
Quick Reference
| Role | File | When to Load |
|---|
| Buying items | INLINECODE0 | Comparing prices, spotting scams, negotiating |
| Selling items |
seller.md | Creating listings, pricing, handling buyers |
| Building marketplace |
builder.md | Designing platform, economics, payments |
| Arbitrage/Reselling |
arbitrage.md | Finding price gaps, calculating true ROI |
| Legal/Tax questions |
compliance.md | Tax nexus, ToS violations, suspensions |
Core Rules
1. Platform-Specific, Never Generic
- - Each platform has unique fees, rules, and dynamics
- eBay auction ≠ Amazon Buy Box ≠ FB Marketplace negotiation
- ALWAYS specify which platform advice applies to
2. Total Cost, Not Sticker Price
- - Include: platform fees, shipping, taxes, return costs
- Amazon referral fee varies 8-45% by category
- eBay 13%+ Poshmark 20%+ Mercari varies
3. Scam Pattern Recognition
- - Stock photos on local marketplaces = red flag
- "Ship to my address, I'll pay extra" = triangulation fraud
- Payment outside platform = no protection
- New account + high-value item + urgency = likely scam
4. Pricing Research = SOLD, Not Listed
- - Listed prices mean nothing—items don't sell at listed price
- Always research completed/sold listings
- Factor in condition: "Good" vs "Very Good" = 30% price difference
5. Suspension Risks Are Real
- - Amazon ODR >1% = account death
- Review manipulation = permanent ban
- IP complaints from brands = immediate suspension
- Multiple accounts = instant termination
6. Fee Complexity
Never estimate fees—calculate exactly:
- - Amazon: referral + FBA + storage + return processing + advertising
- eBay: final value (category-specific) + promoted listings + payment
- Factor returns into margin (15-30% in some categories)
7. Real-Time Data Required
- - Never quote prices from memory/training data
- Inventory and pricing change hourly
- Competitor stock levels affect optimal pricing
- Always verify current marketplace state before advising
架构
基于角色的市场参与指南。根据用户角色加载相应文件。
marketplace/
├── buyer.md # 价格比较、诈骗识别、议价技巧
├── seller.md # 商品上架、定价策略、平台规则
├── builder.md # 市场创建、经济模型、流动性管理
├── arbitrage.md # 价差套利、ROI计算、服务条款风险
└── compliance.md # 税务义务、法律陷阱、封号风险
快速参考
| 角色 | 文件 | 适用场景 |
|---|
| 购买商品 | buyer.md | 比价、识别诈骗、议价 |
| 出售商品 |
seller.md | 创建商品列表、定价、处理买家 |
| 搭建市场 | builder.md | 平台设计、经济模型、支付系统 |
| 套利/转售 | arbitrage.md | 发现价差、计算真实ROI |
| 法律/税务问题 | compliance.md | 税务关联、违反服务条款、账号封禁 |
核心规则
1. 平台专属，拒绝泛化
- - 每个平台都有独特的费用、规则和动态
- eBay拍卖 ≠ 亚马逊Buy Box ≠ FB Marketplace议价
- 务必指明建议适用的具体平台
2. 总成本，而非标价
- - 包含：平台费用、运费、税费、退货成本
- 亚马逊推荐费按品类不同为8-45%
- eBay 13%+ Poshmark 20%+ Mercari 不等
3. 诈骗模式识别
- - 本地市场使用库存照片 = 危险信号
- 寄到我的地址，我会额外付款 = 三角诈骗
- 平台外付款 = 无保障
- 新账号 + 高价值商品 + 紧迫感 = 疑似诈骗
4. 定价研究 = 已售出，而非在售
- - 标价毫无意义——商品不会按标价售出
- 务必研究已完成/已售出的商品列表
- 考虑成色因素：良好 vs 非常好 = 30%价格差异
5. 封号风险真实存在
- - 亚马逊ODR >1% = 账号死亡
- 操纵评论 = 永久封禁
- 品牌知识产权投诉 = 立即暂停
- 多账号运营 = 即时终止
6. 费用复杂性
切勿估算费用——精确计算：
- - 亚马逊：推荐费 + FBA + 仓储费 + 退货处理费 + 广告费
- eBay：最终价值费（按品类）+ 推广列表费 + 支付手续费
- 将退货计入利润率（某些品类为15-30%）
7. 需要实时数据
- - 切勿凭记忆/训练数据报价
- 库存和定价每小时都在变化
- 竞争对手库存水平影响最优定价
- 提供建议前务必核实当前市场状态
