Pro Trek triple-sensor (2018-) (PRG-650, PRG-650Y-1). Current Prices, JDM Listings, Market Analysis
The Pro Trek triple-sensor (2018-) is a Casio outdoor watch bearing reference numbers PRG-650 and PRG-650Y-1, positioned within the brand's long-running line of solar-powered, multifunction field instruments. Tonbo tracks this model because it surfaces regularly on Japanese platforms at prices that can meaningfully undercut the US secondary market. The current US median sits at $199, making it one of the more accessible Pro Trek references with a verifiable price floor. With verified comps behind that figure, it offers a reasonably reliable baseline for buyers deciding whether a Japan-sourced unit makes sense.
Current US Market Value
Based on 11 sales transactions, the PRG-650 price in the US currently centers on a median of $199. The interquartile range runs from $141 at the 25th percentile up to $245 at the 75th percentile, which is a spread wide enough to reward careful sourcing but narrow enough to set clear expectations. The sample size of 11 is modest, so individual outlier sales can pull that median around more than they would on a deeper dataset. Comp quality for this model is rated 🟢 Verified comps, meaning the underlying eBay transactions have passed Tonbo's filtering process and represent real, closed sales rather than asking prices. Anyone researching a PRG-650 for sale in the US should treat $141 as a realistic floor for units with condition issues and $245 as the ceiling for cleaner examples.
Active JDM Listings
Recent activity on Japanese platforms shows a cluster of PRG-650 listings, with prices ranging from very low on flea-market condition pieces up to about ¥34,100 on curated shop listings. One outlier at ¥3,700 on jp likely reflects a heavily worn or incomplete unit. The mid-range flea market entries sit between ¥25,000 and ¥26,000 for cleaner pieces, which is where the arbitrage math starts to work at current exchange rates.
- ¥17,000 on Yahoo Flea (described as a little damaged or dirty)
- ¥25,000 on Yahoo Flea (no noticeable scratches or stains)
- ¥25,000 on Yahoo Flea (damaged or dirty)
- ¥25,960 on Yahoo Shop (condition unknown)
- ¥34,100 on Yahoo Shop (condition unknown)
The gap between the two ¥25,000 flea market listings, one clean and one with reported damage, illustrates how much condition variance exists even at the same nominal asking price when buying PRG-650 Japan. Careful reading of seller condition notes is essential before committing to any of these.
Recent Alert History
No strict or opportunity alerts have fired for the Pro Trek triple-sensor (2018-) in the past 90 days. That means no Japan listings have cleared Tonbo's thresholds for either a clear undervalued buy signal or a strict deal relative to the US market median. This is not unusual for a model trading in a moderate price band where the Japan-to-US spread is real but not dramatic. It does suggest that most current JDM listings are priced within a range the market already expects, rather than representing obvious overlooked opportunities. Subscribers monitoring this model through Tonbo's signals feed will be notified if that changes.
Japan vs. US Price Gap
The core case for sourcing a PRG-650 from Japan rests on the mid-tier flea market listings at roughly ¥25,000, which at recent exchange rates converts to somewhere in the $160 to $170 range before shipping and import costs, sitting below the US median of $199 and well below the $245 upper quartile for a clean example. The structural driver is typical JDM dynamics: Casio outdoor tools like the Pro Trek series sell in large volume domestically, generating steady used inventory that the Japanese resale market absorbs at prices US buyers have not fully caught up to. The main risk here is condition variance, which is pronounced across the current listings. A PRG-650 described only as "damaged or dirty" could mean cosmetic wear or functional issues with sensors or seals, and without hands-on inspection that distinction is hard to make from a listing photo. Buyers should check the Tonbo deals archive for historical examples of what condition grades have actually fetched to calibrate expectations before bidding.
Get Real-Time Alerts for Pro Trek triple-sensor (2018-)
If you want to be notified when a PRG-650 listing clears Tonbo's opportunity thresholds, the most direct route is a tracker subscription at tonbomarket.com/pricing. Alerts fire when Japan prices drop far enough below the US median to make the math clear after realistic landed costs. For a broader look at JDM watch pricing and sourcing analysis before committing, the free newsletter at tonbomarket.com covers new models, market movements, and sourcing notes on a regular schedule.