Terms of Service
Last updated: 17 July 2026
The service
Grand Line Ledger provides market data, analytics, and data-driven observations for One Piece trading card game products. By creating an account or using the site you agree to these terms.
Not financial advice
Everything on this site, including stamps, signals, scores, analyst notes, and articles, is an observation generated from historical market data. None of it is financial advice, a recommendation, or a guarantee of future performance. Trading card prices can fall as well as rise, and past results, including our published backtest and live record, never guarantee future outcomes. You alone are responsible for your buying and selling decisions.
Data accuracy
We aggregate pricing and population data from third-party marketplaces and grading services. We work hard to keep it accurate and current, but we cannot guarantee it is free of errors, gaps, or delays, and we accept no liability for decisions made on it.
Your account
Keep your sign-in method secure; you are responsible for activity under your account. One account per person. We may suspend accounts that abuse the service, including scraping, bulk redistribution of our data or signals, attempting to access non-public information, or reselling access.
Our content and intellectual property
The site's signals, scores, methodology, articles, design, and compiled datasets are our intellectual property. You may use them for your own personal, non-commercial decision-making and may share screenshots or excerpts with attribution. You may not scrape, bulk-export, republish, or commercially redistribute our data or signals without written permission. One Piece and related card names and images are the property of their respective rights holders; card imagery is used for identification and price reference. We are not affiliated with or endorsed by Bandai, Toei Animation, or Shueisha.
Affiliate links
Some outbound links to retailers and marketplaces (including TCGplayer and eBay) are affiliate links. If you buy through them, we may earn a commission from the venue at no extra cost to you. This never influences our signals, verdicts, or rankings, which are computed from market data alone. Prices, stock, and the transaction itself are handled entirely by the venue.
Paid plans
If and when paid plans are offered: billing is monthly via Stripe, you can cancel anytime and keep access to the end of the paid period, and prices may change with notice before your next renewal. Trials convert as clearly stated at sign-up.
Liability and changes
The service is provided as-is. To the maximum extent permitted by law, including the Australian Consumer Law where it applies, we are not liable for losses arising from use of the site. We may update these terms; material changes will be flagged on the site, and continued use means acceptance. These terms are governed by the laws of Australia.