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Ariel's Undersea Castle

10515-1·Duplo·2013·1 minifig·30 parts

Used Avg

$35.82

New Avg

$66.45

Add to your inventory Scan the minifigs

About Ariel's Undersea Castle

Ariel's Undersea Castle (10515-1) is a LEGO Duplo set released in 2013, currently averaging $35.82 used on BrickLink. It comes with 1 minifigure worth a combined $4.56. The set has retired from retail, so secondary market is the only option. The full parts inventory runs 30 pieces.

Part-out value

The minifigures make up only 13% of this set's value ($4.56 out of $35.82). The bulk of the value is in the parts or the set being complete. Sell it as a complete set if possible.

Seller notes

Sealed copies sell for $66.45 vs $35.82 used — a 85% premium. If you have this set new in sealed box (NISB), price it accordingly.

Minifigures in Ariel's Undersea Castle (1)

Duplo Figure, Disney Princess, Ariel, Bright Green Tail (Mermaid) (6044057 / 6137858)

dupmermaid01$4.56

Parts (30)

Duplo, Brick 2 x 4 x 2 Arch

Duplo Treasure Chest Opening 2 x 3 1/2 x 3 with Detailed Lid Ends

Duplo Fish with Large Eyes and Dark Azure Dorsal Fin and Stripes Pattern (Flounder / Fabius)

Duplo, Brick 2 x 3 x 2 Arch Inverted

×2

Duplo, Plant Vine 14L with Leaves and Stud Receptacles on Ends

Duplo Utensil Dish 3 x 3 with Ring, Beaded Pendant Necklace, and Diamond Jewel Pattern

Duplo, Brick 2 x 2

×2

Duplo, Brick 2 x 2

Duplo, Brick 2 x 2 with 3 Shells and Silver Bubbles Pattern

Duplo, Brick 1 x 2 x 2

×2

Duplo, Brick 1 x 2 x 2

×2

Duplo, Plate 2 x 4 x 1/2 (Thick)

×4

Duplo, Brick 1 x 2 x 2 with Crab Sebastian Pattern

Duplo, Brick 1 x 2 x 2 with Silver Mirror and Gold Frame Pattern

Duplo, Plate 4 x 8

Duplo Arch 2 x 8 x 2 with Support

Duplo, Plant Flower with Stud

Duplo Swing Seat

Duplo Slide Straight with Two Studs at Top End

Duplo Cupcake / Muffin Cup with 2 x 2 Studs

Duplo Cupcake Top with Swirl Icing and Stud

Duplo, Brick Round 4 x 4 Dome Top with 2 x 2 Studs with Marbled Yellowish Green Pattern

Duplo, Plate 2 x 6

Duplo Roof Spire 3 x 3 x 3 (Tapered Cone)

×2

Common questions about Ariel's Undersea Castle

How much is LEGO Ariel's Undersea Castle (10515-1) worth?

Ariel's Undersea Castle sells for an average of $35.82 used and $66.45 new/sealed on BrickLink based on 6 months of completed sales. As a retired set, prices tend to hold steady or appreciate over time, especially for complete sets with original packaging. Actual prices vary with completeness — missing minifigures or key parts will lower the value.

What minifigures come in LEGO set 10515-1?

This set includes 1 minifigure: Duplo Figure, Disney Princess, Ariel, Bright Green Tail (Mermaid) (6044057 / 6137858) ($4.56). The minifigures have a combined BrickLink value of $4.56. Each figure is linked above with individual pricing if you're looking to buy or sell specific characters.

Is it worth parting out LEGO Ariel's Undersea Castle?

The minifigures make up about 13% of the set value ($4.56 out of $35.82). Most of the value is in the complete set package, so selling it whole is likely the better move unless you have buyers lined up for specific figures.

Is LEGO Ariel's Undersea Castle (10515-1) retired?

Yes, Ariel's Undersea Castle was released in 2013 and has been retired from retail for several years. Retired LEGO sets are only available on the secondary market through BrickLink, eBay, or other resale platforms.

How do I check if my Ariel's Undersea Castle set is complete?

Use the parts list on this page to check every piece and all 1 minifigure. For the minifigures specifically, you can use the brick'em scanner to identify each figure from a photo and confirm it matches what should be in this set. Missing pieces can be individually sourced on BrickLink.

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