If you're shopping for a used chartplotter in marine electronics sonar navigation, the central question is whether you need a working navigation display or a parts source. The Simrad NSS7 EVO2 is sold for parts, while the Garmin GPSMAP 440S is a complete chartplotter package. For most boaters, that difference settles it quickly.
Quick verdict
Choose the Garmin GPSMAP 440S if you need a functioning chartplotter. The Simrad is $60 cheaper but it's sold for parts-the unit turns on and the buttons make sounds, but the screen isn't usable. The Garmin is the practical pick for anyone heading out on the water. When a display can't show a chart, no amount of saved money makes it useful for navigation.
At a glance
| Product | Listed price | Condition | What's included |
|---|---|---|---|
| Simrad NSS7 EVO2 | USD $219.99 | Used, sold for parts | Display unit only |
| Garmin GPSMAP 440S | USD $279.99 | Used | Suncover, mount, power cord |
The table makes the core difference clear: one unit is a functional navigator, the other is a parts source. That distinction matters most because a chartplotter you can't see won't help you find your way back.
Where each product wins
The Simrad NSS7 EVO2 wins on upfront cost. If you're specifically shopping for a parts donor from this model, the lower price makes it the one to look at. It's a way to keep an older unit alive if you already own the same model and need components.
The Garmin GPSMAP 440S wins on being the only one of the two that can serve as your main chartplotter. For a marine GPS, that functional role matters more than the price gap. You're getting a unit that is a complete chartplotter, not a repair project.
Product notes
SIMRAD NSS7 EVO2
The main reason to consider the Simrad NSS7 EVO2 is its lower price and the opportunity to use it as a parts source. The unit turns on and makes button sounds, but the screen isn't usable or showing anything, so it cannot function as a chartplotter. The condition makes it unsuitable for navigation, and there are no returns on this parts unit. If you need components from this exact model, the lower upfront cost could be worth it. If you're expecting a display you can read on the water, this one will leave you without a visible chart. That makes it a niche pick for a specific kind of buyer, not a general-purpose navigation choice.
Garmin GPSMAP 440S
The Garmin GPSMAP 440S is the one to pick when you need a chartplotter that can actually do the job on the water. It comes with a suncover, mount, and power cord, so you're not starting from scratch with a bare unit. It costs more than the Simrad, but you're getting the essentials for mounting and powering it in the package. For a boater who wants to install a marine GPS and rely on it for navigation, the Garmin is the more complete, ready-to-go choice between these two. Having the suncover and mount included also means fewer separate purchases before you can use it.
Final choice by use case
If you need a functional chartplotter for marine navigation, choose the Garmin GPSMAP 440S. If you need a lower-priced parts unit from a Simrad NSS7 EVO2 and can accept that it is not for navigation, the Simrad is the one to consider.
