About SellerSays
Know where to sell, how to ship, and what you'll actually keep.
SellerSays exists because cross-border selling runs on numbers that are surprisingly hard to get right: duties that changed last month, fee schedules with bracket cliffs, thresholds that flip who collects the tax. Most content about them is stale or vague. We built the alternative we wanted: 45 tools and references backed by 332facts taken only from official sources — government notices, regulators, and platforms' own fee schedules — each with a visible verification date.
Every answer here is labeled: official fact, deterministic calculation, our explicitly stated judgment, or estimate. When a number isn't published, our tools say so instead of guessing. The full rules are on the methodology page.
SellerSays is independently operated and currently carries no advertising, sponsorships, or affiliate placements. If that ever changes, it will be disclosed on the pages affected.
Contact
Corrections are especially welcome — if a cited number is out of date, tell us and we'll re-verify against the primary source: forrestgangqin@gmail.com