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M.T.H. RailKing One-Gauge Southern Pacific 4-8-4 GS-2 Steam Locomotive and Tender 4413: This model train set consists of a 4-8-4 GS-2 steam locomotive and its accompanying tender, manufactured by M.T.H. Electric Trains as part of the RailKing One-Gauge line. Identified by item number 70-

May 30, 2026

M.T.H. RailKing One-Gauge Southern Pacific 4-8-4 GS-2 Steam Locomotive and Tender 4413

Lloyd Ralston Gallery

(3 bids)

MTH Rail King O-Gauge Northern Pacific 0-8-0 Steam Switcher and Tender 30-1124-1: This lot features an O-Gauge 3-rail model steam locomotive and matching tender produced by MTH Electric Trains as part of the Rail King product line. The locomotive is a 0-8-0 Switch Engine decorated

May 30, 2026

MTH Rail King O-Gauge Northern Pacific 0-8-0 Steam Switcher and Tender 30-1124-1

Lloyd Ralston Gallery

Trix HO Scale Union Pacific Class 4000 Big Boy Steam Locomotive and Tender 22599: A highly detailed HO scale model of a Union Pacific Big Boy Class 4000 steam locomotive and its accompanying tender, manufactured by Trix, a subsidiary of the Marklin group. This model, identified as

May 30, 2026

Trix HO Scale Union Pacific Class 4000 Big Boy Steam Locomotive and Tender 22599

Lloyd Ralston Gallery

(3 bids)

(2) Alco Union Pacific & Lionel CP Canadian Pacific Rail Engines: A pair of engines including a Walther's Mainline Alco diesel Union Pacific 1292 powered engine tested and working, and a Lionel CP Rail 6-8854 powered engine also tested and working, both without boxe

Jun 13, 2026

(2) Alco Union Pacific & Lionel CP Canadian Pacific Rail Engines

(3) Lionel Union Pacific 202 Orange Engines: A set of three Lionel Union Pacific 202 orange train engines, all tested with working movement and lights, with all three showing detached windshields inside the bodies.

Jun 13, 2026

(3) Lionel Union Pacific 202 Orange Engines

Williams 2023 Union Pacific Engine Set Boxed: A Williams boxed No. 2023 Union Pacific engine set, both engines in good condition, with the powered unit running and lighting up, and the dummy unit lighting up.

Jun 13, 2026

Williams 2023 Union Pacific Engine Set Boxed

(2) Lionel New Haven & Union Pacific Orange Engines: A pair of Lionel diesel engines including a New Haven 232 Alco diesel and a Union Pacific 202 Alco diesel, both tested and working, with both windshields detached inside, and no boxes present.

Jun 13, 2026

(2) Lionel New Haven & Union Pacific Orange Engines

(9) Lionel Union Pacific Engine, Caboose, Pullman Combo Passenger Cars: A collection of nine Lionel Union Pacific and passenger rail pieces including cabooses Nos. 16569 and 9706, New Haven No. 6069 passenger car, Plainfield No. 6070 passenger car, powered engines Nos. 21

Jun 13, 2026

(9) Lionel Union Pacific Engine, Caboose, Pullman Combo Passenger Cars

Rail King by MTH Electric Trains O-Gauge Western and Atlantic Railroad Texas Steam Locomotive and: This set from Rail King by MTH Electric Trains features a 4-4-0 Texas steam locomotive and tender along with a group of Overton passenger cars themed for the Western and Atlantic Railroad (W. & A.

May 30, 2026

Rail King by MTH Electric Trains O-Gauge Western and Atlantic Railroad Texas Steam Locomotive and

Lloyd Ralston Gallery

(4 bids)

M.T.H. Electric Trains Nickel Plate Road Berkshire 2-8-4 Steam Locomotive and Tender No. 765: This lot features an O-Gauge model steam locomotive and tender produced by M.T.H. Electric Trains, identified as Item No. 20-3032-1. The model represents a Nickel Plate Road (N.Y.C. & ST. L.) Berk

May 30, 2026

M.T.H. Electric Trains Nickel Plate Road Berkshire 2-8-4 Steam Locomotive and Tender No. 765

Lloyd Ralston Gallery

(5 bids)

Gold M.T.H. Electric Trains The Millennium Series New York Central Hudson Steam Locomotive and: A set of M.T.H. (Mike's Train House) Electric Trains from The Millennium Series featuring a New York Central J1e Hudson Steam Locomotive and a group of Madison-style passenger cars. The collection con

May 30, 2026

Gold M.T.H. Electric Trains The Millennium Series New York Central Hudson Steam Locomotive and

Lloyd Ralston Gallery

(3 bids)

(2) MTH Pennsylvania Alco Engines: A pair of MTH Pennsylvania Alco diesel engines, Nos. 9624 and 9622, both in good condition with light signs of use. One powered unit has been tested, runs, and has working lights, and the dummy unit l

Jun 13, 2026

(2) MTH Pennsylvania Alco Engines

41 past auction results for "mth-big-boy"

Browse a record of outcomes from past auctions, including sale prices and unsold items.

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MTH Union Pacific Big Boy Steam Engine In Box: MTH Union Pacific Big Boy Steam Engine Locomotive In Box.4-8-8-4 Engine with ProtoSound. Engine appears not to have been run. Excellent to near mint nearly 24 inches long.

2026

MTH Union Pacific Big Boy Steam Engine In Box

American Antique AuctionsHaddon Heights, NJ

MTH O Gauge Union Pacific 4-8-8-4 Big Boy Steam Loco: MTH O Gauge 20-3127-1 Union Pacific Big Boy Steam Locomotive and Tender in original shelf worn and faded original box.

2025

MTH O Gauge Union Pacific 4-8-8-4 Big Boy Steam Loco

Turner Auctions + AppraisalsSouth San Francisco, CA

2pc MTH Electric Train, Union Pacific Big Boy Model 4014: This is a meticulously crafted HO Scale model of the Union Pacific Big Boy #4014, one of the most iconic locomotives in American rail history. Built to represent the original steam engine renowned for

2025

2pc MTH Electric Train, Union Pacific Big Boy Model 4014

Lion and UnicornHollywood, FL

MTH RailKing One Gauge Union Pacific Big Boy Steam Engine: An impressive and highly detailed MTH RailKing One Gauge model of the legendary Union Pacific Big Boy 4-8-8-4 Steam Engine No. 4004. This model train, crafted with precision and authenticity, replicat

2025

MTH RailKing One Gauge Union Pacific Big Boy Steam Engine

Lion and UnicornHollywood, FL

MTH RailKing 30-1287-1 UP Big Boy: Nice O gauge 4-8-8-4 Articulated equipped with ProtoSmoke, Light, ProtoSounds 2.0 with Freight Yard ProtoEffects. It shows light use with box.

2024

MTH RailKing 30-1287-1 UP Big Boy

Weiss AuctionsLynbrook, NY

MTH Rail King Union Pacific Big Boy 4020 4-8-8-4: MTH Rail King Union Pacific Big Boy #4020 4-8-8-4 locomotive & tender. Excellent overall condition; still showcased inside original opened packaging. Perfect addition to your collection, great gift id

2024

MTH Rail King Union Pacific Big Boy 4020 4-8-8-4

Donley AuctionsUnion, IL

RailKing M.T.H. Union Pacific Steam Engine & Tender: RailKing M.T.H. Union Pacific Steam Engine & Tender MTH Union Pacific 4-8-8-4 Big Boy Steam Engine & Tender, Cab No. 4004. Features include Detailed weather-resistant poly-carbonate boiler and tender

2024

RailKing M.T.H. Union Pacific Steam Engine & Tender

Fine Estate, Inc. San Rafael, CA

MTH O-scale 4-8-8-4 Big Boy Steam Engine - Union P: MTH O-scale 4-8-8-4 Big Boy Steam Engine - Union Pacific - 20-3127-1. Runs forward and backward; comes with original box; see photos for any details and imperfections . 35W 3D 4H Provenance: The Herit

2024

MTH O-scale 4-8-8-4 Big Boy Steam Engine - Union P

Quinn's Auction GalleriesFalls Church, VA

MTH - UP Big Boy steam engine: Mike's Train House - UP Big Boy steam engine Runs forward and backward. O Gauge 20-3229-1E R5 35W 3D 4.25H All Train and Train accessories in this

2023

MTH - UP Big Boy steam engine

Quinn's Auction GalleriesFalls Church, VA

MTH (Premier) - 20-3129-1: Union Pacific - 4-8-8-4 Big Boy Steam Engine With Proto-Sound 2.0 - w/OB: MTH (Premier) - 20-3129-1: Union Pacific - 4-8-8-4 Big Boy Steam Engine With Proto-Sound 2.0 - Union Pacific - TCA 50th Anniversary Cab No. , w/OB / Condition: C10

2023

MTH (Premier) - 20-3129-1: Union Pacific - 4-8-8-4 Big Boy Steam Engine With Proto-Sound 2.0 - w/OB

Gregory Hake AuctionsSt. Peters, MO

MTH O Gauge Union Pacific Big Boy Loco and Tender: MTH O Gauge Union Pacific Big Boy Loco and Tender, in C8 - test run - and in its original box. This is a PS - 1 version.

2023

MTH O Gauge Union Pacific Big Boy Loco and Tender

Harris Toy & Train AuctionsReno, NV

MTH O Gauge Union Pacific Big Boy Diecast Steam Loco and Tender: MTH O Gauge Union Pacific Big Boy Diecast Steam Loco and Tender, in C8 test run only and in its original box. Was a PS - 1 and now with PS - 2 upgrade.

2023

MTH O Gauge Union Pacific Big Boy Diecast Steam Loco and Tender

Harris Toy & Train AuctionsReno, NV

MTH RailKing 30-1129-1 UP Big Boy: 031. Nice 4-8-8-4 Articulated steam loco, equipped with dual smoking stacks, ProtoSounds with Freight Station Proto Effects and more. It shows light run time and would benefit from a light cleaning fr

2022

MTH RailKing 30-1129-1 UP Big Boy

Weiss AuctionsLynbrook, NY

MTH O Gauge Dealer Appreciation Program Union Pacific: MTH O Gauge Dealer Appreciation Program Union Pacific Big Boy Articulated Steam Engine and Union Pacific steam Engine in Original Styrofoam packing, in C10 factory new. This piece is missing its origi

2022

MTH O Gauge Dealer Appreciation Program Union Pacific

Harris Toy & Train AuctionsReno, NV

MTH MT-3021LP UNION PACIFIC BIG BOY: O ga, 3-rail, w/smoke & sound, orig set box & insert, C9.

2022

MTH MT-3021LP UNION PACIFIC BIG BOY

Lloyd Ralston GalleryShelton, CT

MTH O Gauge Premier 4-8-4 Big-Boy Union Pacific Steam: MTH O Gauge Premier 4-8-4 Big-Boy Union Pacific Steam Locomotive and Tender, in C10 factory new with Proto-Sound 1 and original styrofoam packing. The original box is missing.

2022

MTH O Gauge Premier 4-8-4 Big-Boy Union Pacific Steam

Harris Toy & Train AuctionsReno, NV

MTH RAIL KING TRAIN SET: O ga, 30-1287-1 UP Big Boy w/smoke & sound, w/cars 30-7887, 30-7847, 30-7074A, 33-7309, 30-75149, 30-75210, orig boxes & inserts, C8-9.

2021

MTH RAIL KING TRAIN SET

Lloyd Ralston GalleryShelton, CT

UNION PACIFIC MTH O - SCALE BIG BOY STEAM LOCOMOTIVE: The item number is MT-3021LP in box, never run. Condition: (Mint). Dimensions: 28" x 12" x 6".

2021

UNION PACIFIC MTH O - SCALE BIG BOY STEAM LOCOMOTIVE

Dan Morphy AuctionsDenver, PA

MTH RailKing 30-1129-1 UP Bog Boy: Nice 031 Big Boy that is equipped with ProtoSounds and shows light runtime with box.

2021

MTH RailKing 30-1129-1 UP Bog Boy

Weiss AuctionsLynbrook, NY

Lot of 3: M.T.H. & Rail King Trains In Boxes.: Lot consists of: No. 30-1129-1 M.T.H Rail King Union Pacific Big Boy with Proto-Sound; No. 20-3023-1 WV P&P O Scale Shay with Proto-Sound; and Baldwin AS 616 Diesel Locomotive Southern Pacific MT-2137

2019

Lot of 3: M.T.H. & Rail King Trains In Boxes.

Dan Morphy AuctionsDenver, PA

MTH 3021LP, Union Pacific Big Boy Steam Engine: Union Pacific Big Boy Steam Engine and Tender. 3 Rail with Protosound. Catalog # MT-3021LP. Comes in the original box. Untested.

2015

MTH 3021LP, Union Pacific Big Boy Steam Engine

Weiss AuctionsLynbrook, NY

MTH MT-3021LP UP BIG BOY LOCO & TENDER: O ga, w/sound & smoke, orig box & insert minor wear, C8-9.

2015

MTH MT-3021LP UP BIG BOY LOCO & TENDER

Lloyd Ralston GalleryShelton, CT

MTH Imperial Big Boy Steam Engine O Gauge.: Black Union Pacific tender car and 4020 engine. Heavy plastic and die-cast construction. Condition (Excellent). Size 18-1/2" x 4" x 4"

2015

MTH Imperial Big Boy Steam Engine O Gauge.

Dan Morphy AuctionsLas Vegas, NV

RK by MTH 30-1129-1 UP Big Boy Loco MIB: Rail King by MTH 30-1129-1 Union Pacific Big Boy steam loco and tender with Proto-Sounds in OB. Loco and tender have never been run, C9-10.

2014

RK by MTH 30-1129-1 UP Big Boy Loco MIB

Stout AuctionsWest Middlesex, PA

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