Set 5009823

Fish Tank Filter & Fish Food

Name: LEGO 5009823 Fish Tank Filter & Fish Food
SKU: 5009823

Promotional · 2025 · 177 pieces

Retail price—Never sold in shops

Worth now$99.98Based on 3 recent sealed sales

Asking now$129.99Typical price on 3 eBay listings

vs retail—Needs both prices

Not enough data

Fewer than 5 listings behind this value — too thin to call.

See listings on eBay

How much is LEGO 5009823 Fish Tank Filter & Fish Food worth?

LEGO 5009823 Fish Tank Filter & Fish Food is worth about $99.98 sealed right now, based on 3 recent sealed sales. It came out in 2025 with 177 pieces. It was never sold in shops. We last checked it 2 days ago.

Price history

We’ve only measured this set once so far. The chart appears once there are two readings — usually within a few days.

Should you buy it?

Only 3 listings behind this. I wouldn’t bet money on the number yet.

If you bought it to resell

Sells sealed for$100

Marketplace fees · 15.25%−$15

Payment processing · 2.9% + $0.30−$3

Shipping · est. from 177 pieces−$9

Reaches you$72

Pay no more than$56

For a 30% return at your costs. Change them and every figure on the site follows.

What it actually sold for

Sealed

$100

3 sold in six months · $100–$100

Used

$90

1 sold in six months

Sellers are asking 30% more than buyers actually paid. The $130 figure above is a ceiling; this is the floor to negotiate toward.

Completed BrickLink transactions over the last six months. Real sales, not asking prices.

Worth more in pieces?

Parted out$20vsSealed$100

Sealed is worth 80% more. Not one to break.

Minifigures: —
Loose parts: 181 pieces

Minifigure prices are real completed BrickLink sales. The parts figure is an estimate — the set’s own inventory at the catalogue average, not each piece priced individually. Treat it as a guide, and remember parting out is hours of work and many small sales.

Set details

Set number: 5009823
Theme: Promotional
Released: 2025
Status: Promotional giveaway — not sold in shops
Pieces: 177
Minifigures: —
Retail price: —
Value per piece: $0.734
Price confidence: low · 3 listings
Last checked: 2 days ago

Where these numbers come from

check it yourself

eBay3 live listingsThe asking price here — the median of what sellers want right now, $130. Last checked Oct 26.See the listings →BrickLink3 completed salesWhat it actually sold for — $100 across six months of real transactions. Last checked Oct 24.Open the price guide →Catalogue177 piecesPiece counts, minifigures, release year and retail price come from Rebrickable and Brickset.See the catalogue entry →

eBay links are affiliate links — if you buy after clicking, we earn a small commission at no cost to you, and that is what pays for the site. BrickLink has no such programme, so those are plain links. Neither changes what we show or what we say about it.

How to read this. The value is the median of live sealed listings, after removing instructions, empty boxes, used sets, multi-set lots and implausible outliers. Real sale prices usually land below asking, so the buy-below figure is deliberately the conservative end of the range.