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

Monson Railroad Bonanza THREE booklets Maine Two Footers RARE
Monson Railroad Bonanza THREE booklets Maine Two Footers RARE
$35.00
Time Remaining: 48m
Buy It Now for only: $35.00
ON3 ON30 SILVER CITY MODELS DRGW 1872 17 4 WHEEL GONDOLA CAR KIT
ON3 ON30 SILVER CITY MODELS DRGW 1872 17 4 WHEEL GONDOLA CAR KIT
$26.00
Time Remaining: 6h 42m
Buy It Now for only: $26.00
ON3 ON30 SILVER CITY MODELS DRGW 1872 12 4 WHEEL BOX CAR KIT
ON3 ON30 SILVER CITY MODELS DRGW 1872 12 4 WHEEL BOX CAR KIT
$36.00
Time Remaining: 6h 42m
Buy It Now for only: $36.00
Busch 12340 H0f Field Railway Track Crossing New Original Packaging
Busch 12340 H0f Field Railway Track Crossing New Original Packaging
$26.98
Time Remaining: 9h 22m
Buy It Now for only: $26.98
Bachmann 26002 On30 Excursion Car Red with Tan Roof
Bachmann 26002 On30 Excursion Car Red with Tan Roof
$41.83
Time Remaining: 13h 40m
Buy It Now for only: $41.83
Bachman Spectrum 0n30 Plug  Play Module 44953 Stearns Heisler Sound Module
Bachman Spectrum 0n30 Plug Play Module 44953 Stearns Heisler Sound Module
$53.00
Time Remaining: 18h 53m
Buy It Now for only: $69.00
O On3 On30 WISEMAN MODEL SERVICES DOLBEER SINGLE SPOOL DONKEY ENGINE KIT
O On3 On30 WISEMAN MODEL SERVICES DOLBEER SINGLE SPOOL DONKEY ENGINE KIT
$69.95
Time Remaining: 19h 5m
Buy It Now for only: $69.95
MASTER CREATIONS FRED C DOBBS MINING SUPPLY CO KIT40
MASTER CREATIONS FRED C DOBBS MINING SUPPLY CO KIT40
$125.00
Time Remaining: 22h 54m
MILEPOST MODELS ROGERS PLUMBING  HEATING SUPPLY 1809 NEW RE ISSUE
MILEPOST MODELS ROGERS PLUMBING HEATING SUPPLY 1809 NEW RE ISSUE
$50.60
Time Remaining: 23h 7m
Buy It Now for only: $50.60
O scale On30 scale Logging Truck custom weathered after historic pictures
O scale On30 scale Logging Truck custom weathered after historic pictures
$115.00
Time Remaining: 1d 24m
On30 or 0 scale Logging Truck custom built and weathered after historic picture
On30 or 0 scale Logging Truck custom built and weathered after historic picture
$148.00
Time Remaining: 1d 24m
On30 or 0 scale Logging Truck for diorama custom weathered lot 7
On30 or 0 scale Logging Truck for diorama custom weathered lot 7
$78.00
Time Remaining: 1d 24m
O scale or On30 Logging Steam Donkey custom weathered after historic picture
O scale or On30 Logging Steam Donkey custom weathered after historic picture
$145.00
Time Remaining: 1d 24m
O scale On30 Steam Tractor Logging Diorama custom weathered diorama
O scale On30 Steam Tractor Logging Diorama custom weathered diorama
$165.00
Time Remaining: 1d 24m
On30 or O scale Logging Truck custom weathered and built after historic picture
On30 or O scale Logging Truck custom weathered and built after historic picture
$146.00
Time Remaining: 1d 24m
O scale On30 Alaskan Tractor Caterpillar Logging Diorama custom weathered
O scale On30 Alaskan Tractor Caterpillar Logging Diorama custom weathered
$149.00
Time Remaining: 1d 24m
Old Ford Logging Truck custom weathered lot 4  O SCALE  ON30
Old Ford Logging Truck custom weathered lot 4 O SCALE ON30
$118.00
Time Remaining: 1d 24m
NEW Hawthorne Village ON30 Scale 2 6 0 Loco  Tender Christmas Express Bundle
NEW Hawthorne Village ON30 Scale 2 6 0 Loco Tender Christmas Express Bundle
$125.00
Time Remaining: 1d 10h 56m
ON3 GRANDT LINE STOCK CAR KIT
ON3 GRANDT LINE STOCK CAR KIT
$25.00
Time Remaining: 1d 12h 28m
Noch 58671 HOM Hoe Rhne Viaduct for Narrow Gauge Railway  NIP
Noch 58671 HOM Hoe Rhne Viaduct for Narrow Gauge Railway NIP
$40.08
Time Remaining: 1d 12h 31m
Buy It Now for only: $40.08
Noch 58668 HOM Hoe bruchstein viadukt for Narrow Gauge Railway  NIP
Noch 58668 HOM Hoe bruchstein viadukt for Narrow Gauge Railway NIP
$53.43
Time Remaining: 1d 12h 31m
Buy It Now for only: $53.43

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g Peco Streamline HO OO Gauge Narrow Gauge LH RH Turnout BOXED
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On30 Model Railroad Hotel Built Finished Lighted Narrow Gauge Model Railroad Bld
Sunset Valley RR SW 4 BR WYE Narrow Gauge 4 40 45mm Brass WYE Switch
O On30 Narrow Gauge Passenger Depot Ellicott City Style BUILT Millwork Included
BUILT On30 Blacksmith Shop Narrow Gauge Backwoods Shop With Chimney On Rear Wall
On30 Built Narrow Gauge LeanToo Stone Shed Open Front W McCormick Deering Tracto
Sn3 model trains
On30 passenger car painted as Northern Pacific 558 bachmann
BUILT On30 Narrow Gauge Stone Railroad Passenger Depot On30 Custom Weathered
On30 Stone Model Railroad Building BUILT Millwork Included Narrow Gauge Railroa