Seiko Prospex Save the Ocean Great White Shark Turtle SRPD21 (SRPD21, SRPD21J1, SRPD21K1). Current Prices, JDM Listings, Market Analysis
The Seiko Prospex Save the Ocean Great White Shark Turtle SRPD21 is a conservation-themed diver released under Seiko's ongoing Save the Ocean collaboration series, sitting alongside the broader Turtle family of 45mm divers. It carries reference numbers SRPD21, SRPD21J1, and SRPD21K1, with the J1 and K1 suffixes indicating regional variants. Tonbo tracks this model because JDM-market units occasionally surface in Japan at prices below what US buyers are paying, and the conservation branding creates collector demand that can push prices unevenly across markets. The current US median puts the SRPD21 price at $340, giving prospective buyers a useful anchor before they start shopping.
Current US Market Value
Based on available US transaction data, the Seiko Prospex Save the Ocean Great White Shark Turtle SRPD21 SRPD21 is trading at a median of $340, with the middle 50% of sales falling between $279 and $400. That $121 spread is meaningful on a $340 median and reflects genuine condition and timing variance rather than a tight, liquid market. It is worth noting that this analysis is built on a sample size of 6 comparable sales, which Tonbo flags with a 🟡 Limited comps rating. The directional signal is useful, but buyers and sellers should treat the exact figures as approximate until more transaction volume accumulates. If you want to see how alert signals have fired on similar models with thicker comp sets, the Tonbo signals page gives a clearer picture of how pricing confidence scales with sample depth.
Active JDM Listings
There are no active Japanese marketplace listings for the SRPD21 recorded within the past 14 days. That absence is itself a data point. Inventory for this model in Japan appears thin at the moment, which can mean two things depending on your read of the market: either recent supply has already cleared through, or this model simply does not move through JDM secondary channels with high frequency. Buyers looking for SRPD21 for sale in Japan should set up alerts rather than checking manually, because listings when they do appear tend to be brief. Key things to monitor when listings do surface include the following.
- Condition grade and whether original box and papers are included, which meaningfully affects realized price within the $279 to $400 band
- Seller platform, as pricing norms and buyer protections vary across Japanese auction and marketplace services
- Regional variant suffix, since SRPD21J1 and SRPD21K1 units may carry slight differences relevant to importation
- Shipping and import cost estimates, which affect the true landed cost when you buy SRPD21 Japan listings directly
- Listing age, because stale listings sometimes signal an overpriced unit that has failed to move
Recent Alert History
No strict or opportunity alerts have fired for the Seiko Prospex Save the Ocean Great White Shark Turtle SRPD21 in the past 90 days. This is an honest reflection of the current data environment rather than a sign of poor model selection. With limited comp coverage and no active JDM listings in the tracking window, the conditions that trigger Tonbo's alert tiers simply have not been met. Alerts require both a qualifying listing and sufficient pricing confidence to determine whether a unit is genuinely below market. Collectors watching this model should treat the current quiet period as a reason to get it on a watchlist now, before a listing does appear.
Japan vs. US Price Gap
For Save the Ocean variants like the SRPD21, the Japan-to-US price gap is driven primarily by the conservation branding carrying stronger retail resonance in Western markets, meaning US buyers have historically shown more willingness to pay a premium for the thematic story attached to these releases. Japanese secondary sellers often price closer to generic Turtle comps rather than factoring in that collector premium, which is where arbitrage opportunities have appeared on similar models. The main risk in acting on that gap for the SRPD21 specifically is comp thinness. With only 6 data points anchoring the US median, a single outlier transaction can distort the apparent spread, and a buyer who overpays on shipping and fees relative to a thinner-than-expected price gap may not come out ahead. You can see how gap analysis plays out on models with stronger comp sets at the Tonbo deals page.
Track Seiko Prospex Save the Ocean Great White Shark Turtle SRPD21 on Tonbo
Tonbo is free to start at tonbomarket.com/dashboard. The Collector tier gives you a five-model watchlist with no credit card required, so you can add the SRPD21 now and get notified when JDM listings appear or pricing data thickens. If you want real-time Discord alerts the moment a qualifying listing fires, the Member tier is $10 per month and covers unlimited watchlist models. Given that this model currently sits at limited comp quality and zero active listings, getting it into a tracked watchlist is the practical next step rather than checking marketplaces manually and hoping the timing works out.