Garmin Fenix 3
• Material: Fiber-reinforced polymer body with a metal bezel
• Water resistance: 10 ATM (up to 100m)
• Controls: 5 side buttons (LIGHT, START/STOP, BACK/LAP, DOWN, UP/MENU)
• Display: Non-touch, round screen
• Back side: Charging and data contacts (4-pin) + serial number
• Strap: Standard silicone, replaceable

strap shows some wear, and the screen bezel has scratches, but the watch itself looks intact.

For the Fenix 3, most units with serials starting with 3G… were produced around 2015–2016.
• Since the Fenix 3 was discontinued by 2017, this watch was almost certainly manufactured in that 2015–2016 window.

When released in 2015, the Fenix 3 had a launch MSRP in the U.S. around $499.99 (for the base version) and up to $599.99 for the Sapphire or HR variants.
• In the UK, it launched at around £369. 
• According to early reviews, the “performer bundle” version was sold at €429 in some European markets.

So, in short: ~ USD 499–599 (or equivalent) was the original premium-level retail price.

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✅ Summary
• Original MSRP: ~ USD 499–599 (depending on version, features)
• Current market: ~ €90 on the low end (used) up to ~ €550–650 for good-condition or sealed “old stock” units