FIRST LEGO League · 45804-1

LEGO 45804-1 HYDRO DYNAMICS Challenge Kit

2017 2,052 pieces Retired
New / sealed value$233.133.6% above original retail
Original retail$225.00Launch price
Used value$193.50Current estimate
90-day trendN/A63 months recorded
PRICE GUIDE

Current LEGO 45804-1 values

Condition-specific market estimates compared with the original retail price.

New / sealed value $233.13 +3.6% vs. retail
Used value $193.50 $189.82 – $215.36
Original retail $225.00 Launch price
Market values are estimates for the set condition shown; live retailer and marketplace prices may differ.
MARKET TREND

Price history

Source-reported monthly market closes through Jul 2024; these can differ from the current estimated market value.

Monthly close$246.7812 plotted months
Used value$193.50Current estimate
Used range$189.82 – $215.36Current low to high
Latest monthly close$246.78
Period low$244.03
Period high$305.62
Period change-15.2%
MARKET VALUE Sealed price history
Latest $246.78 -15.2% over period
Monthly market value history Closing market value from Aug 2023 to Jul 2024. $315 $288 $261 $235 Aug 2023: $290.90 Sep 2023: $290.04 Oct 2023: $305.62 Nov 2023: $244.03 Dec 2023: $257.15 Jan 2024: $256.39 Feb 2024: $270.17 Mar 2024: $269.37 Apr 2024: $283.84 May 2024: $283.01 Jun 2024: $298.21 Jul 2024: $246.78 Aug 2023Jan 2024Jul 2024
View monthly price data
MonthOpenLowHighCloseSalesSource
2024-07 $225.00 $225.00 $262.93 $246.78 N/A Market data provider
2024-06 $257.55 $243.99 $325.32 $298.21 N/A Market data provider
2024-05 $255.23 $245.98 $301.52 $283.01 N/A Market data provider
2024-04 $245.14 $232.24 $309.65 $283.84 N/A Market data provider
2024-03 $242.94 $234.12 $286.99 $269.37 N/A Market data provider
2024-02 $233.33 $225.00 $294.73 $270.17 N/A Market data provider
2024-01 $231.23 $225.00 $273.16 $256.39 N/A Market data provider
2023-12 $225.00 $225.00 $280.53 $257.15 N/A Market data provider
2023-11 $225.00 $225.00 $260.00 $244.03 N/A Market data provider
2023-10 $263.95 $250.06 $333.41 $305.62 N/A Market data provider
2023-09 $261.58 $252.09 $309.01 $290.04 N/A Market data provider
2023-08 $251.23 $238.01 $317.34 $290.90 N/A Market data provider
EXTERNAL ESTIMATE

Independent Market Value Trend

Source-reported new/sealed market estimates, aggregated monthly and displayed in USD.

Latest estimate$143.08
Period low$141.17
Period high$171.49
Period change-16.6%
MARKET VALUE Independent new/sealed market value
Latest $143.08 -16.6% over period
Monthly market value history Closing market value from Sep 2025 to Aug 2026. $176 $163 $150 $137 Sep 2025: $171.49 Oct 2025: $142.62 Nov 2025: $142.91 Dec 2025: $145.49 Jan 2026: $147.88 Feb 2026: $146.08 Mar 2026: $142.54 Apr 2026: $145.08 May 2026: $144.27 Jun 2026: $141.17 Jul 2026: $141.92 Aug 2026: $143.08 Sep 2025Feb 2026Aug 2026
View independent market value data
MonthOpenLowHighCloseSource
2026-08 $141.98 $141.98 $143.69 $143.08 Secondary-market data provider
2026-07 $141.04 $139.68 $142.84 $141.92 Secondary-market data provider
2026-06 $144.29 $140.50 $144.33 $141.17 Secondary-market data provider
2026-05 $144.64 $143.66 $145.83 $144.27 Secondary-market data provider
2026-04 $143.23 $142.61 $146.22 $145.08 Secondary-market data provider
2026-03 $146.09 $142.26 $146.09 $142.54 Secondary-market data provider
2026-02 $147.83 $145.34 $147.83 $146.08 Secondary-market data provider
2026-01 $145.54 $143.90 $148.20 $147.88 Secondary-market data provider
2025-12 $143.80 $143.80 $146.06 $145.49 Secondary-market data provider
2025-11 $143.11 $142.17 $144.53 $142.91 Secondary-market data provider
2025-10 $168.84 $142.62 $168.84 $142.62 Secondary-market data provider
2025-09 $192.90 $171.49 $194.91 $171.49 Secondary-market data provider
VALUE OUTLOOK

Growth and retirement

Total growthN/ACurrent sealed value vs MSRP
Annual growthN/A12-month close change
1-year forecastN/AN/A
5-year forecastN/AN/A
5-year rangeN/ACollected estimate
Used value range$189.82 – $215.36Observed market range
INCLUDED CHARACTERS

Minifigures

1 listed
SET PRICE GUIDE

LEGO 45804-1 HYDRO DYNAMICS Challenge Kit price, value and history

LEGO 45804-1 HYDRO DYNAMICS Challenge Kit is a set released in 2017 in the FIRST LEGO League theme with 2,052 pieces. This BrickPriceWatch price guide combines a current new and sealed value of $233.13, an original retail price of $225.00, and 63 months of source-reported price history in USD.

The current comparison is based on collected market observations rather than a guaranteed selling price. The recorded used value is $193.50. The set is recorded as retired.

Current market dataa current new and sealed value of $233.13
Retail comparisonan original retail price of $225.00
Retailer availabilityno recent verified retailer quote; open the offer panel for the latest observed links.

How to use this LEGO price guide

Use the price guide to compare new and sealed value with the original retail price, inspect monthly high, low, and closing prices, and review current retailer offers before buying. Set condition, completeness, packaging, shipping, taxes, and marketplace timing can change the final price.