We've searched the internet and found the largest collection of On30 Scale trains for sale is on eBay. Below are the listings for 'gauge railroad'.

Noch 58671 Hom Hoe Rhne Viaduct for Narrow Gauge Railway  Nip
Noch 58671 Hom Hoe Rhne Viaduct for Narrow Gauge Railway Nip
$40.22
Time Remaining: 1d 5h 23m
Buy It Now for only: $40.22
Noch 58668 Hom Hoe Bruchstein Viadukt for Narrow Gauge Railway  Nip
Noch 58668 Hom Hoe Bruchstein Viadukt for Narrow Gauge Railway Nip
$53.62
Time Remaining: 1d 5h 23m
Buy It Now for only: $53.62
HO HOn3 Shinohara Code 70 Dual Gauge Flex Box of 10 NIB Box 1
HO HOn3 Shinohara Code 70 Dual Gauge Flex Box of 10 NIB Box 1
$55.00 (1 Bid)
Time Remaining: 1d 12h 38m
HO HOn3 Shinohara Code 70 Dual Gauge Flex Box of 10 NIB Box 2
HO HOn3 Shinohara Code 70 Dual Gauge Flex Box of 10 NIB Box 2
$55.00 (1 Bid)
Time Remaining: 1d 12h 38m
Simpson On3 Narrow Gauge Train Railroad Parts Assortment
Simpson On3 Narrow Gauge Train Railroad Parts Assortment
$89.99
Time Remaining: 2d 11m
Buy It Now for only: $89.99
Narrow Gauge Cumbres  Toltec 6 CD PHOTO SET 1300 JPEGS
Narrow Gauge Cumbres Toltec 6 CD PHOTO SET 1300 JPEGS
$29.99
Time Remaining: 2d 8h 47m
Buy It Now for only: $29.99
BINKLEY KIT BUILT HOn3 NARROW GAUGE COLORADO NORTHERN CN ORE WAGON
BINKLEY KIT BUILT HOn3 NARROW GAUGE COLORADO NORTHERN CN ORE WAGON
$129.70
Time Remaining: 3d 17h 30m
Buy It Now for only: $129.70
Sunset Valley RR TR NG SS Narrow Gauge 45mm Stainless Track
Sunset Valley RR TR NG SS Narrow Gauge 45mm Stainless Track
$53.54
Time Remaining: 4d 7h 43m
Buy It Now for only: $53.54
Sunset Valley RR TR NG NS Narrow Gauge 45mm Nickel Silver Track
Sunset Valley RR TR NG NS Narrow Gauge 45mm Nickel Silver Track
$62.99
Time Remaining: 4d 7h 46m
Buy It Now for only: $62.99
Sunset Valley RR SW 4 BR WYE Narrow Gauge 4 40 45mm Brass WYE Switch
Sunset Valley RR SW 4 BR WYE Narrow Gauge 4 40 45mm Brass WYE Switch
$120.74
Time Remaining: 4d 8h 8m
Buy It Now for only: $120.74
BINKLEY KIT BUILT HOn3 NARROW GAUGE DENVER RIO GRANDE DRGW BOX CAR WAGON 315 nd
BINKLEY KIT BUILT HOn3 NARROW GAUGE DENVER RIO GRANDE DRGW BOX CAR WAGON 315 nd
$64.52
Time Remaining: 5d 2h 33m
Buy It Now for only: $64.52
On30 Narrow Gauge Train Set Loco Tender 3 Cars Scratch Built  Weathered Train
On30 Narrow Gauge Train Set Loco Tender 3 Cars Scratch Built Weathered Train
$475.00
Time Remaining: 5d 5h 43m
Buy It Now for only: $475.00
On30 Model Railroad Depot BUILT w Platform Narrow Gauge Backwoods Depot
On30 Model Railroad Depot BUILT w Platform Narrow Gauge Backwoods Depot
$158.00
Time Remaining: 5d 5h 46m
Buy It Now for only: $158.00
On30 BUILT Stone Narrow Gauge Passenger Depot w On30 Stone Storage Building
On30 BUILT Stone Narrow Gauge Passenger Depot w On30 Stone Storage Building
$154.00
Time Remaining: 5d 5h 47m
Buy It Now for only: $154.00
On30 BUILT Model Railroad Depot w Platform Narrow Gauge Backwoods Passenger Depo
On30 BUILT Model Railroad Depot w Platform Narrow Gauge Backwoods Passenger Depo
$150.00
Time Remaining: 5d 5h 47m
Buy It Now for only: $150.00
BUILT On30 Narrow Gauge Stone Railroad Passenger Depot W Platform Weathered
BUILT On30 Narrow Gauge Stone Railroad Passenger Depot W Platform Weathered
$160.00
Time Remaining: 5d 5h 49m
Buy It Now for only: $160.00
On30 Narrow Gauge Locomotive Shed WITH SHOP Built Shay Climax Heisler Locos
On30 Narrow Gauge Locomotive Shed WITH SHOP Built Shay Climax Heisler Locos
$110.00
Time Remaining: 5d 5h 50m
Buy It Now for only: $110.00
BUILT On30 Narrow Gauge Stone Backwoods Miners Cabin Loggers Cabin Custom Build
BUILT On30 Narrow Gauge Stone Backwoods Miners Cabin Loggers Cabin Custom Build
$75.00
Time Remaining: 5d 5h 51m
Buy It Now for only: $75.00
BUILT On30 Blacksmith Shop Narrow Gauge Backwoods Shop With Chimney On Rear Wall
BUILT On30 Blacksmith Shop Narrow Gauge Backwoods Shop With Chimney On Rear Wall
$60.00
Time Remaining: 5d 5h 51m
Buy It Now for only: $60.00
BUILT On30 Blacksmith Shop Narrow Gauge Backwoods Shop With Window On Rear Wall
BUILT On30 Blacksmith Shop Narrow Gauge Backwoods Shop With Window On Rear Wall
$60.00
Time Remaining: 5d 5h 52m
Buy It Now for only: $60.00
On30 Hotel Complete Built Narrow Gauge RR Two Story City Stone Building O Scale
On30 Hotel Complete Built Narrow Gauge RR Two Story City Stone Building O Scale
$185.00
Time Remaining: 5d 6h 15m
Buy It Now for only: $185.00

Other On30 Scale train items recently purchased through this site:

HO HOn3 Shinohara Code 70 Dual Gauge Flex Box of 10 NIB Box 2
Narrow Gauge Cumbres Toltec 6 CD PHOTO SET 1300 JPEGS
On30 Narrow Gauge Mercantile Stone Building Kit Inc Millwork Some Bricked Window
2 car set 1203 Scale Narrow Gauge Fall River Gondola flat car
SCRATCH BUILT WOODEN ON30 GAUGE O SCALE COVERED BRIDGE NARROW GAUGE LAYOUT 58
Sunset Valley RR TR NG SS Narrow Gauge 45mm Stainless Track
THREE VOLUME SET RIO GRANDE Chasing the Narrow Gauge Vol I II III
Sunset Valley RR TR NG NS Narrow Gauge 45mm Nickel Silver Track
On30 BUILT Model Railroad Depot w Platform Narrow Gauge Backwoods Passenger Depo
BUILT On30 Blacksmith Shop Narrow Gauge Backwoods Shop With Window On Rear Wall
Sunset Valley RR SW 4 BR WYE Narrow Gauge 4 40 45mm Brass WYE Switch
On30 Narrow Gauge Train Set Loco Tender 3 Cars Scratch Built Weathered Train
On30 Narrow Gauge Locomotive Shed WITH SHOP Built Shay Climax Heisler Locos
g Peco Streamline HO OO Gauge Narrow Gauge LH RH Turnout BOXED
BUILT On30 Narrow Gauge Stone Railroad Passenger Depot W Platform Weathered
On30 Hotel Complete Built Narrow Gauge RR Two Story City Stone Building O Scale
BUILT On30 Blacksmith Shop Narrow Gauge Backwoods Shop With Chimney On Rear Wall
On30 Model Railroad Depot BUILT w Platform Narrow Gauge Backwoods Depot
On30 BUILT Stone Narrow Gauge Passenger Depot w On30 Stone Storage Building
NEVADA CENTRAL Sagebrush Narrow Gauge NEW BOOK
On30 Model Railroad Hotel Built Finished Lighted Narrow Gauge Model Railroad Bld
O On30 Narrow Gauge Passenger Depot Ellicott City Style BUILT Millwork Included
On30 Model Railroad Building Built Painted On30 Narrow Gauge Blacksmith Shop
On30 Built Narrow Gauge LeanToo Stone Shed Open Front w 2 weathered tractors
On30 Narrow Gauge Fire Station Late 1800s Early 1900s Fire Station O Scale