JDM Watch Arbitrage Alerts
Mispriced JDM Watches.
Found Daily. Sent to You.
Tonbo monitors 400–800 new listings per day on Yahoo Auctions Japan and Mercari Japan. When a watch shows 25%+ estimated margin after Buyee fees and EMS shipping, you get a Discord alert and an email. Active flippers see the same listing within minutes of it appearing.
See Pricing →Recent examples — from the live Tonbo feed
JDM Watch
Watch only
73.8% margin
JDM Watch
Watch only
73.6% margin
JDM Watch
Watch onlyEst. net margin deducts 16% for eBay final value fee and payment processing. Does not include US shipping or listing time. Your results depend on condition, photos, and current comp pool. Last refreshed July 28, 2026 at 00:00 UTC.
How watch flipping works
Step 01
Source from Japan
Vintage Seiko, Grand Seiko, King Seiko, and Citizen watches sell on Yahoo Auctions Japan and Mercari Japan at yen prices that, at current FX, are 30–60% below what US buyers pay on eBay. Tonbo surfaces the listings with the widest spreads.
Step 02
Buy through Buyee
Buyee is a Japan proxy service. You bid or buy through their interface. They receive the watch at their Japan warehouse and ship it internationally. Landed cost includes the yen price, Buyee fees (11% on Yahoo Auctions, flat ¥300 on Mercari), domestic shipping, and EMS to the US.
Step 03
List on eBay
eBay is the primary US resale market for vintage Japanese watches. Sold-comp data is reliable. Buyers are present. Expect 60–90 day cycles from Japan purchase to eBay sale, including 10–14 day EMS transit. Good listings sell in 2–4 weeks.
Step 04
Pocket the spread
After eBay final value fees (13%), payment processing (2.9%), and US shipping, net margins on Tonbo-flagged listings typically run $60–$200 per watch. Real margins, not paper spreads.
The math on one flip
| Mercari Japan listing | ¥22,800 (≈$147) |
| Buyee fee (Mercari flat) | $2 |
| Domestic + EMS shipping | $37 |
| Currency conversion (2%) | $3 |
| Landed cost | $189 |
| eBay sold price | $465 |
| eBay final value fee (13%) | −$60 |
| Payment processing (2.9%) | −$13 |
| US shipping (insured) | −$12 |
| Net margin | $191 |
This is a real flip from the case study guide below. Reference: Seiko 6309-7290, sourced from Mercari Japan. 7 weeks start to finish. Full numbers in the guide.
Common questions
How much capital do I need to start?
One flip requires $200–$600 in capital, including the Japan purchase and all fees. The watch is illiquid for 6–10 weeks between purchase and eBay sale. Running 3 flips concurrently requires $600–$1,800 deployed at once. That capital sits out of your hands until eBay closes the sale.
Do I need to know anything about watches?
You need to learn two to three references well. Deep knowledge of a narrow set outperforms broad surface-level familiarity. Tonbo alerts flag which references are showing margin. The flipper's job is condition assessment from photos, landed cost math, and listing execution.
What does Tonbo actually do?
Tonbo monitors Yahoo Auctions Japan and Mercari Japan continuously. When a listing passes the credibility filter and shows 25%+ estimated margin against eBay sold comps, paid subscribers receive a Discord DM and an email alert. You set a watchlist of references you care about; Tonbo matches alerts to your list. Free tier subscribers see deals with a 48-hour delay at tonbomarket.com/deals.
Is this passive income?
No. Flipping JDM watches requires upfront capital, active photo evaluation, eBay listing work, and buyer communication. Tonbo removes the hardest part of the job, which is manually scanning 800 listings per day across two Japanese platforms. The judgment and execution are still yours.
Get the alerts in real time.
Founder subscribers receive personalized Discord DMs and email alerts the moment a listing clears Tonbo's filters. Set your watchlist to the references you flip. Get pinged when one shows up at margin.
See Founder Pricing →Read the flip guides
- How to Flip JDM Watches: Complete Beginner's Guide — sourcing, landed cost math, eBay listing, capital requirements
- JDM Watch Flipping Case Study: Real Numbers from Three Flips — three actual flips with full fee breakdowns and net margins
- JDM Watch Arbitrage: How the Price Gap Works — why the spread exists and how long it is likely to persist
- Buyee vs ZenMarket vs FromJapan — fee comparison for Japan proxy services