Omega watch database and price guide
Omega Seamaster Diver 300M Blue: specs, new price and used value
For the USA market, a fair used price for the Omega Seamaster Diver 300M Blue is usually $3500-4700. A good buy is normally under $3900, while prices above $5300 need unusually strong condition, full set, warranty, scarcity, or live market confirmation.
- Retail price band
- $5900-6300
- New online band
- $4500-5900
- Used fair range
- $3500-4700
- Good buy under
- $3900
- Avoid over
- $5300
- Value retention
- medium-high
Direct answer for buyers
For the USA market, a fair used price for the Omega Seamaster Diver 300M Blue is usually $3500-4700. A good buy is normally under $3900, while prices above $5300 need unusually strong condition, full set, warranty, scarcity, or live market confirmation.
Verdict: The value case rests on price: $3,500–$4,700 used against $4,500–$5,900 new. Target $3,900 or below and walk away past $5,300.
Watch specifications
- Brand: Omega
- Collection: Seamaster Diver 300M
- Reference: 210.30.42.20.03.001
- Category: Swiss luxury dive watch
- Movement: Omega 8800 automatic
- Case size: 42 mm
- Lug-to-lug: 50 mm
- Thickness: 13.6 mm
- Crystal: Sapphire crystal
- Water resistance: 300 m
- Market region: United States / North America
- Currency: USD
Who should buy it?
Best for: Someone looking for a diver they can wear every day without paying full retail — this reference is priced sensibly below $3,900 used.
Not ideal for: Anyone buying sight-unseen from an unverified private seller without photos of the exact Seamaster Diver 300M case and movement.
Market notes and resale
One of the most liquid used watches around, so there is plenty of choice and no reason to overpay. Most buyers target the ceramic wave dial generation.
Price confidence: Early editorial estimate — verify current listings. Last editorial review: 2026-10-03.
Used buyer checklist
- Confirm the exact reference and dial configuration before paying
- Check bezel action and that the insert lines up at 12
- Check that the crystal fitted is the original type for this reference
- Verify the crown threads and that it screws down fully
- Ask about gasket condition and any water-resistance service
Known issues and pricing traps
- Bezel inserts are frequently replaced aftermarket
- Water resistance is only as good as the last service and gasket change
- Resale holds up, so discounts are modest
Similar watches to compare
How this price range is set
Editorial estimate for the US market, not a live quote. Bands reflect typical retail and second-hand pricing for this reference and are revised when sold-listing evidence arrives.
Ranges are reduced for condition, missing links, no box or papers, unknown service history and poor photos, and adjusted when current new-watch discounts make a used price unattractive.
FAQ
What price should I target for the Omega Seamaster Diver 300M Blue?
Use $3900 as the good-buy target. The fair used range is $3500-4700, and a used listing above $5300 needs unusually strong condition, completeness, warranty or scarcity.
Should I buy the Omega Seamaster Diver 300M Blue new or used?
Compare the used asking price with the current new online band of $4500-5900. If the saving is small, buying new can be safer because you get warranty and cleaner return rights.
What changes the value most?
Condition, box and papers, bracelet or strap completeness, service history, seller reputation, warranty status and unusually poor listing photos move the real transaction price.
What should I check before buying used?
Check the exact reference, case and bracelet condition, movement/module function, service or battery history, seller feedback and whether the price still makes sense after tax, shipping and return risk.
Important pricing note
USA watch prices move with condition, state sales tax, seller type, box and papers, current discounts, service history and seller trust. Use this page as a research starting point, then verify live US listings before paying.