LEGO 721 Steam Locomotive is a vintage Trains set from 1969 valued at $793 for new and sealed sets, up 6797% from an original retail price of $11.50. Annual appreciation has averaged 5.06% since release. Used copies are valued between $140 and $361 depending on condition.

Set Value (New/Sealed)

This chart represents the current new/sealed value of the set Steam Locomotive since June 2016. High accuracy
LEGO 721-1 Steam Locomotive is a Trains/12V set released in 1969, containing 126 pieces. The set builds a steam locomotive fitted with a 12V motor and marked with the number "721" on its sides. It is the same locomotive model included in set 720 Train with 12 V Motor, but this version was sold without track, wagons, or additional rolling stock. The set belongs to LEGO's early 12V train system from the late 1960s.

A new and sealed Steam Locomotive is currently valued at around $793, with annual growth of approximately 5%, which is higher than other 12V sets. The average used price is $301 for those in good overall condition. Based on current trends, this set could be valued near $833 within the next year.
Steam Locomotive (721-1) is a very old and rare LEGO set. It has not been available online or in retail stores in good/new condition for over 2 years. Because of its scarcity, the current estimated value of in new condition of $793.14 may be much lower than its true market value. Released in 1969, sealed sets in good condition are especially difficult to find, often commanding a premium well above estimates.
There are currently no new/sealed listings available for Steam Locomotive at this time.
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Sets in Trains / 12V

720-2 Train with 12V Electric Motor

Theme / Subtheme Trains / 12V
Year 1969
Pieces 369
Availability Retired
720-2 LEGO Train with 12V Electric Motor
Retail $24.50
Value $879.49
Growth  +3489.8%
Annual growth 6.5%

702 12V Motor with Accessories Pack

Theme / Subtheme Trains / 12V
Year 1969
Pieces 28
Availability Retired
702 LEGO Trains 12V Motor with Accessories Pack
Retail $7.25
Value $233.37
Growth  +3118.9%
Annual growth 3.6%

750 8 Straight 12V Conducting Rails

Theme / Subtheme Trains / 12V
Year 1969
Pieces 8
Availability Retired
750 LEGO Trains 8 Straight 12V Conducting Rails
Retail $1.49
Value $20.56
Growth  +1279.9%
Annual growth 2.7%

751 8 Curved 12V Conducting Rails

Theme / Subtheme Trains / 12V
Year 1969
Pieces 8
Availability Retired
751 LEGO Trains 8 Curved 12V Conducting Rails
Retail $1.49
Value $11.66
Growth  +682.6%
Annual growth 3.0%

753 Automatic Right Electric Switch

Theme / Subtheme Trains / 12V
Year 1969
Pieces 5
Availability Retired
753 LEGO Trains Automatic Right Electric Switch
Retail $4.75
Value $80.93
Growth  +1603.8%
Annual growth 4.8%

754 Automatic Left Electric Switch

Theme / Subtheme Trains / 12V
Year 1969
Pieces 5
Availability Retired
754 LEGO Trains Automatic Left Electric Switch
Retail $4.75
Value $86.50
Growth  +1721.1%
Annual growth 5.2%

705 Motor Bushings

Theme / Subtheme Trains / 12V
Year 1969
Pieces 4
Availability Retired
705 LEGO Trains Motor Bushings
Retail $0.50
Value $5.82
Growth  +1064.0%
Annual growth 3.9%

704 12V Sleeper Track Contacts

Theme / Subtheme Trains / 12V
Year 1969
Pieces 2
Availability Retired
704 LEGO Trains 12V Sleeper Track Contacts
Retail $0.75
Value $31.15
Growth  +4053.3%
Annual growth 6.2%

703 12V Replacement Motor

Theme / Subtheme Trains / 12V
Year 1969
Pieces 1
Availability Retired
703 LEGO Trains 12V Replacement Motor
Retail $2.25
Value $43.73
Growth  +1843.6%
Annual growth 5.3%

706 Rail Contact Wires

Theme / Subtheme Trains / 12V
Year 1969
Pieces 1
Availability Retired
706 LEGO Trains Rail Contact Wires
Retail $0.75
Value $25.98
Growth  +3364.0%
Annual growth 5.9%

740-2 12V Transformer for 220V Pack

Theme / Subtheme Trains / 12V
Year 1969
Pieces 1
Availability Retired
740-2 LEGO Trains 12V Transformer for 220V Pack
Retail $12.50
Value $44.68
Growth  +257.4%
Annual growth 2.3%

707-2 12V Train Replacement Parts Retailer Pack

Theme / Subtheme Trains / 12V
Year 1969
Availability Retired
707-2 LEGO 12V Train Replacement Parts Retailer Pack
Retail $99.50
Value $957.95
Growth  +862.8%
Annual growth 4.1%