Disclaimer

Research only, not investment advice

All prices, market signals and listing links are provided for research and comparison only. TCG sealed boxes and cards can move sharply due to supply, demand, language, condition, seller risk, currency rates and market sentiment.

OP Box Index does not recommend buying, selling or holding any specific product. Always verify listing details, seller history, shipping cost, taxes and reseal risk before making a purchase.

Active listings are not the same as completed sales. Sold prices are used as market references where available; active links are current purchase options that can change or disappear.

Paid links

Paid Link: OP Box Index may earn a commission from qualifying purchases made through eBay links, at no extra cost to the buyer.

As an Amazon Associate, OP Box Index may earn from qualifying purchases made through Amazon links, at no extra cost to the buyer.

Affiliate compensation does not decide whether a listing is marked as verified. Listing quality filters prioritize sealed booster box wording, Japanese One Piece Card Game relevance, price sanity, seller location signals and shipping-inclusive price where available.

Data license and usage

OP Box Index publishes market summaries, calculated price bands and research notes for personal, non-commercial research. Do not republish, resell, bulk scrape or present OP Box Index data as an official marketplace feed.

Third-party marketplace names, listing links, card images and price references remain subject to their original owners' terms. Source links should be checked directly before any purchase decision.

Daily listing review

Verified lowest booster box links and PSA 10 active listing links are rechecked every day at 03:00 KST when automated eBay access is available. Listings may still sell out, be revised, become unavailable in a buyer's country or fail eBay's own filters after the last update.

Buyer responsibility

Before purchasing, buyers are responsible for checking seller feedback, item photos, title accuracy, language version, sealed condition, taxes, customs duties, shipping cost, return policy, authenticity and reseal risk. OP Box Index is not the seller and does not guarantee marketplace availability, delivery, condition or authenticity.