Choosing between a standalone sonar fishfinder and an all-in-one chartplotter is one of the first decisions you face in marine electronics sonar navigation. Two used products show how different those paths can be. The GARMIN Fishfinder Depth Finder 80 is a dedicated depth/fish finder with sonar sensors, listed at USD 65.00. The SIMRAD NSS7 EVO2 Boat Chartplotter Fishfinder GPS Radar Unit Display for Parts is a larger all-in-one platform at USD 219.99, but it is a parts unit rather than a working display. That difference matters more than the price gap.
Quick verdict
The Garmin is the practical pick for most anglers who just want sonar on the water. It's a straightforward fishfinder/depth finder, and it costs $154.99 less. The Simrad's broader feature set is appealing, but unless you need a donor unit for an existing NSS7 EVO2, its unusable screen makes the Garmin the safer buy.
At a glance
| Product | Listed price | Condition | What it is | Best for |
|---|---|---|---|---|
| GARMIN Fishfinder Depth Finder 80 Marine Boat Sonar | USD 65.00 | Used | Dedicated fishfinder/depth finder with Decimal & Imperial measurements | Anglers who want a simple sonar unit |
| SIMRAD NSS7 EVO2 Boat Chartplotter Fishfinder GPS Radar Unit Display for Parts | USD 219.99 | Used | NSS7 EVO2 chartplotter/fishfinder/GPS/radar display sold for parts | Parts donor for another NSS7 EVO2 |
Where each product wins
The Garmin wins for anyone who wants one job done well: finding fish and reading depth through sonar. The fishing-focused build keeps it a simple addition to a boat that already has navigation handled.
The Simrad wins on scope. The NSS7 EVO2 name signals a much larger all-in-one platform, giving it a bigger role in a repair or restoration project. Just remember that this is a parts unit, not a working navigation screen.
Product notes
#### GARMIN Fishfinder Depth Finder 80 Marine Boat Sonar
This is the lower-cost route into marine sonar. The Garmin is a fishfinder/depth finder with sonar sensors, and it can show depth in either Decimal or Imperial units, which is a nice convenience if you already think in one system. Choose it if you want a dedicated unit for depth and fishfinding rather than a full chartplotter. The limitation is the other side of that focus: it is not an all-in-one navigation display, so you shouldn't expect chartplotting, GPS, or radar duties from it.
#### SIMRAD NSS7 EVO2 Boat Chartplotter Fishfinder GPS Radar Unit Display for Parts
If you already work with the NSS7 EVO2 platform, this is the unit to consider. The Simrad display pairs chartplotter, fishfinder, GPS, and radar in one unit, which makes it a much broader parts source than a standalone depth finder. The reason to hesitate is also clear: it turns on and buttons make sounds, but the screen isn't usable or showing anything. That makes this a component donor, not a ready-to-view chartplotter. Choose the Simrad for an NSS7 EVO2 repair project, and pick the Garmin when you need a sonar/depth finder you can use directly.
Final choice by use case
Choose the GARMIN Fishfinder Depth Finder 80 when you want a dedicated sonar/depth finder and don't need a multi-function screen. It's the more direct answer for anglers who want to know what's below the boat without taking on a bigger display project.
Choose the SIMRAD NSS7 EVO2 when your priority is repairing or completing another NSS7 EVO2. Treat it as a parts source for that platform rather than as a working chartplotter or fishfinder, and let the Garmin handle the sonar duties you need today.
