How Much Is a Natural King Helmet Sea Shell (Cassis tuberosa), Large Decorative Conch Specimen Worth?
A Natural King Helmet Sea Shell (Cassis tuberosa), Large Decorative Conch Specimen sells for about $23.75; the middle half of 10 recent sales went for $18 to $42.
Typical sale price
$23.75
Half of 10 recent sales went for $18 to $42
Lowest $14. Highest $129.93, far above the rest.
Sold price guide, updated October 27, 2026
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Recent sales
6 of the 10 completed sales behind this guide.
- $17.99Sold Sep 20
Large King Helmet Striped Conch Sea Shell Natural Nautical Beach Ocean Decor
- $76.49Sold Sep 6
Vintage Natural King Helmet Conch Seashell Cassis Tuberosa Coastal Decor 6 Inch
- $44.99Sold Aug 24
Large Natural Horned King Helmet Cassis Tuberosa Shell Seashell Specimen
- $22.50Sold Aug 11
Large King's Helmet Conch Shell Natural Seashell Ocean Nautical Decor Art 6x5x5
- $129.93Sold Aug 7
Huge Large Giant Queen King Helmet Horned Conch Shell Natural Specimen 12X8X9
- $25Sold Jul 30
Large Natural Queen King Helmet Conch Seashell 3.5 lbs.
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What moves the price
Asking or sold
Listings ask
$34.50
median asking price
Sales closed at
$23.75
45% under asking
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Frequently Asked Questions
How much is a Natural King Helmet Sea Shell (Cassis tuberosa), Large Decorative Conch Specimen worth?
A Natural King Helmet Sea Shell (Cassis tuberosa), Large Decorative Conch Specimen sells for about $23.75; the middle half of 10 recent sales went for $18 to $42.
Is one worth selling?
A typical one sells for $23.75. After eBay's selling fee that leaves about $20.52, before shipping and what you paid for it.
What is the most one has sold for?
The highest of the 10 recent sales we track was $129.93. That is well above the middle half of sales, $18 to $42.
What are sellers asking for one?
Listings ask about $34.50, 45% above the $23.75 that sales actually closed at.
Other Collectibles Guides
Recent value guides for related items in the same category. See what collectibles is worth →
Based on 10 recent sold listings. Last updated October 27, 2026.
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