
Cached eBay asking average ≈ $401 · 2 asking listings · as of Jul 19, 2026
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AI-detected from the product image
Prospex Sea collection · 33 watches
2 colorways
The living market
Tracked on the secondary market, updated through the day. Not appraisals or offers.
1 for sale right now.
Observed range · Watch family · 4 weeks, Jul 6, 2026–Aug 31, 2026
Seiko on the secondhand market
+8.0%
2026 so far · +3.3% to +12.9% · 75 matched watches
In line with the index
Divers as a group: +7.3% · 297 matched watches
Year-by-year readings →The connection engine
The community take
Owners widely praise the Seiko Prospex Sea for its excellent value, solid build, and comfortable wearability, with specific mentions of its matte black dial, excellent lume, and cushion case that wears smaller than its dimensions suggest. The 4R36 movement is noted for hacking and hand-winding capabilities, and the bezel action is described as smooth and precise. Some owners find the watch to be a legitimate tool with a fair price, while others describe it as big, thick, and heavy, uncomfortable for smaller wrists, though this is subjective as one owner found the size perfect. The solar quartz movement is also highlighted as a collection-worthy feature. On balance, owners and reviewers rate the Seiko Prospex Sea highly for its exceptional value and comfortable, classic design.
On video
On real wrists · 1
The paper trail
In collections
The matchups people make with the Seiko Prospex Sea most — open one to see it side by side.
The discussion