![LEGO 9731-1 Vision Command [RCX Digital Colour Camera]](https://img.brickpricewatch.com/images/6616433cf1d8ff7fbdd29f185b4099fd1953025c9bbe4a2682bac7033c0a297c.webp)
RCX · 9731-1
Vision Command [RCX Digital Colour Camera]
Similar market value
New$108.41
RCX · 3800-1
LEGO 3800-1 Ultimate Builders Set
New / sealed value$97.3362.2% above original retail
Original retail$59.99Launch price
Used value$50.00Current estimate
90-day trendN/A188 months recorded
PRICE GUIDE
Current LEGO 3800-1 values
Condition-specific market estimates compared with the original retail price.
New / sealed value
$97.33
+62.2% vs. retail
Used value
$50.00
$49.00 – $60.00
Original retail
$59.99
Released Sep 2001
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 Aug 2026; these can differ from the current estimated market value.
Monthly close$86.2124 plotted months
Used value$50.00Current estimate
Used range$49.00 – $60.00Current low to high
Latest monthly close$86.21
Period low$86.21
Period high$201.36
Period change-33.4%
MARKET VALUE
Sealed price history
Latest
$86.21
-33.4% over period
View monthly price data
| Month | Open | Low | High | Close | Sales | Source |
|---|---|---|---|---|---|---|
| 2026-08 | $74.46 | $70.54 | $94.05 | $86.21 | 3 | Market data provider |
| 2026-07 | $96.50 | $93.00 | $114.00 | $107.00 | 3 | Market data provider |
| 2026-06 | $119.35 | $113.07 | $150.75 | $138.19 | 3 | Market data provider |
| 2026-05 | $131.72 | $126.95 | $155.61 | $146.06 | 3 | Market data provider |
| 2026-04 | $106.40 | $100.80 | $134.40 | $123.20 | 2 | Market data provider |
| 2026-03 | $121.76 | $117.35 | $143.84 | $135.01 | 2 | Market data provider |
| 2026-02 | $129.68 | $122.85 | $163.80 | $150.15 | 5 | Market data provider |
| 2026-01 | $112.91 | $108.81 | $133.38 | $125.19 | 2 | Market data provider |
| 2025-12 | $133.13 | $126.12 | $168.16 | $154.15 | 3 | Market data provider |
| 2025-11 | $129.12 | $124.44 | $152.53 | $143.17 | 3 | Market data provider |
| 2025-10 | $126.90 | $120.22 | $160.29 | $146.93 | 3 | Market data provider |
| 2025-09 | $119.30 | $114.97 | $140.93 | $132.28 | 3 | Market data provider |
| 2025-08 | $131.20 | $124.30 | $165.73 | $151.92 | 3 | Market data provider |
| 2025-07 | $150.15 | $144.70 | $177.38 | $166.49 | 3 | Market data provider |
| 2025-06 | $173.90 | $164.75 | $219.66 | $201.36 | 3 | Market data provider |
| 2025-05 | $144.39 | $139.16 | $170.58 | $160.10 | 3 | Market data provider |
| 2025-04 | $129.23 | $122.42 | $163.23 | $149.63 | 5 | Market data provider |
| 2025-03 | $119.15 | $114.83 | $140.75 | $132.11 | 3 | Market data provider |
| 2025-02 | $111.41 | $105.55 | $140.73 | $129.00 | 2 | Market data provider |
| 2025-01 | $124.53 | $120.01 | $147.11 | $138.08 | 7 | Market data provider |
| 2024-12 | $130.25 | $123.40 | $164.53 | $150.82 | 2 | Market data provider |
| 2024-11 | $126.33 | $121.74 | $149.24 | $140.07 | 2 | Market data provider |
| 2024-10 | $109.46 | $103.70 | $138.26 | $126.74 | 3 | Market data provider |
| 2024-09 | $116.71 | $112.47 | $137.87 | $129.40 | 2 | Market data provider |
EXTERNAL ESTIMATE
Independent Market Value Trend
Source-reported new/sealed market estimates, aggregated monthly and displayed in USD.
Latest estimate$232.32
Period low$228.17
Period high$239.85
Period change+1.5%
MARKET VALUE
Independent new/sealed market value
Latest
$232.32
+1.5% over period
View independent market value data
| Month | Open | Low | High | Close | Source |
|---|---|---|---|---|---|
| 2026-08 | $231.11 | $231.11 | $232.52 | $232.32 | Secondary-market data provider |
| 2026-07 | $229.06 | $228.74 | $231.11 | $231.11 | Secondary-market data provider |
| 2026-06 | $234.35 | $228.19 | $234.41 | $229.28 | Secondary-market data provider |
| 2026-05 | $235.48 | $233.33 | $236.85 | $234.31 | Secondary-market data provider |
| 2026-04 | $233.53 | $231.92 | $237.39 | $235.48 | Secondary-market data provider |
| 2026-03 | $237.55 | $230.93 | $237.55 | $231.37 | Secondary-market data provider |
| 2026-02 | $239.85 | $236.51 | $239.85 | $237.55 | Secondary-market data provider |
| 2026-01 | $236.45 | $233.77 | $240.95 | $239.85 | Secondary-market data provider |
| 2025-12 | $234.35 | $233.71 | $237.19 | $236.45 | Secondary-market data provider |
| 2025-11 | $232.50 | $231.23 | $234.39 | $232.74 | Secondary-market data provider |
| 2025-10 | $235.92 | $232.42 | $236.53 | $232.50 | Secondary-market data provider |
| 2025-09 | $235.74 | $234.35 | $238.20 | $236.26 | Secondary-market data provider |
| 2025-08 | $229.48 | $229.48 | $235.66 | $234.59 | Secondary-market data provider |
| 2025-07 | $237.65 | $230.33 | $237.65 | $230.33 | Secondary-market data provider |
| 2025-06 | $228.17 | $228.17 | $235.84 | $235.84 | Secondary-market data provider |
| 2025-05 | $228.86 | $223.49 | $229.02 | $228.17 | Secondary-market data provider |
| 2025-04 | $230.93 | $228.54 | $230.93 | $228.86 | Secondary-market data provider |
MARKET ACTIVITY
Through Aug 2026
Sales and liquidity
Reported sealed-market sales and monthly price ranges for the latest 6 months.
Reported sales166-month total
Monthly average2.7reported sales
Active months6 / 6with at least one sale
3-month trend+28.6%9 vs 7 sales
LiquidityLimited activitybased on reported sales
Recent monthly price distributionLow · close · high
Aug 2026
$86.21
$70.54
$86.21
$94.05
3 sales
Jul 2026
$107.00
$93.00
$107.00
$114.00
3 sales
Jun 2026
$138.19
$113.07
$138.19
$150.75
3 sales
May 2026
$146.06
$126.95
$146.06
$155.61
3 sales
Apr 2026
$123.20
$100.80
$123.20
$134.40
2 sales
Mar 2026
$135.01
$117.35
$135.01
$143.84
2 sales
Activity labels describe reported historical sales only; they do not guarantee that a set can be sold immediately.
VALUE OUTLOOK
Growth and retirement
Total growthN/ACurrent sealed value vs MSRP
Annual growthN/A12-month close change
1-year forecast$100.34+3.1%
5-year forecast$112.25+15.3%
5-year range$109.00 – $115.00Collected estimate
Used value range$49.00 – $60.00Observed market range
MethodSource-provided projectionDisplayed as collected; BrickPriceWatch does not recalculate it.
Forecast sourceMarket data providerSource attached to the forecast fields.
Recorded history188 monthsCurrent history coverage on BrickPriceWatch.
ConfidenceNot independently scoredA range appears only when the source supplies bounds.
Forecasts are directional estimates, not guaranteed future prices or investment advice. Actual value depends on condition, demand, fees, and sale timing.
Released in 2001 and later retired, the Ultimate Builders Set, an early Mindstorms expansion with an extra motor and CD-ROM, benefits from sealed scarcity and low remake risk, and its niche robotics focus brings stronger post-retirement interest but narrower, more volatile demand than flagship robotics titles.
SET PRICE GUIDE
LEGO 3800-1 Ultimate Builders Set price, value and history
LEGO 3800-1 Ultimate Builders Set is a set released in 2001 in the RCX theme with 322 pieces. This BrickPriceWatch price guide combines a current new and sealed value of $97.33, an original retail price of $59.99, and 188 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 $50.00. The set is recorded as retired.
Current market dataa current new and sealed value of $97.33
Retail comparisonan original retail price of $59.99
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.
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