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

RS O On3 On30 KEIL LINE MODELS 48 125 INDUSTRIAL STIFF LEG DERRICK CRAFTSMAN KIT
RS O On3 On30 KEIL LINE MODELS 48 125 INDUSTRIAL STIFF LEG DERRICK CRAFTSMAN KIT
$103.50 (14 Bids)
Time Remaining: 6h 39m
RS O On3 On30 SEQUOIA SCALE MODELS BRANCHLINE SAND HOUSE AND BUCKET CRANE KIT
RS O On3 On30 SEQUOIA SCALE MODELS BRANCHLINE SAND HOUSE AND BUCKET CRANE KIT
$32.00 (3 Bids)
Time Remaining: 7h 41m
O SCALE On3 On30 BANTA MODEL WORKS 6153 Oakboro Hay  Grain
O SCALE On3 On30 BANTA MODEL WORKS 6153 Oakboro Hay Grain
$132.00
Time Remaining: 7h 52m
Buy It Now for only: $132.00
Hon3 Blackstone Models DRGW High Side Gondola Road Number 9206  Weathered
Hon3 Blackstone Models DRGW High Side Gondola Road Number 9206 Weathered
$54.95
Time Remaining: 8h 1m
Suncoast Models 004 148 O Scale Logging Camp Craftsman Kit On3On30
Suncoast Models 004 148 O Scale Logging Camp Craftsman Kit On3On30
$56.00 (8 Bids)
Time Remaining: 8h 2m
CHB Models VB 630 148 O Scale Vertical Boiler Kit On3On30 LoggingMachinery
CHB Models VB 630 148 O Scale Vertical Boiler Kit On3On30 LoggingMachinery
$54.95
Time Remaining: 8h 2m
KMP Models O Scale Steam Powered Sawmill w Planer LumberLogging Interior MIB
KMP Models O Scale Steam Powered Sawmill w Planer LumberLogging Interior MIB
$129.95
Time Remaining: 8h 11m
Boulder Valley Models 302 Enclosed Cab Dunkirk Geared Steam Locomotive
Boulder Valley Models 302 Enclosed Cab Dunkirk Geared Steam Locomotive
$39.99
Time Remaining: 9h 11m
RS O On3 On30 COLORADO SCALE MODELS 475 LEAVERITE MINE CRAFTSMAN KIT
RS O On3 On30 COLORADO SCALE MODELS 475 LEAVERITE MINE CRAFTSMAN KIT
$93.47 (5 Bids)
Time Remaining: 9h 28m
RS O On3 On30 ARKANSAS VALLEY MODELS 511 WAYSIDE WAREHOUSE STRUCTURE KIT
RS O On3 On30 ARKANSAS VALLEY MODELS 511 WAYSIDE WAREHOUSE STRUCTURE KIT
$49.95
Time Remaining: 9h 49m
RS O On3 On30 ARKANSAS VALLEY MODELS 515 MILL CREEK MARKET STRUCTURE KIT
RS O On3 On30 ARKANSAS VALLEY MODELS 515 MILL CREEK MARKET STRUCTURE KIT
$80.00 (5 Bids)
Time Remaining: 9h 49m
RS O On3 On30 ARKANSAS VALLEY MODELS 579 JEFFERSON DRY GOODS STRUCTURE KIT
RS O On3 On30 ARKANSAS VALLEY MODELS 579 JEFFERSON DRY GOODS STRUCTURE KIT
$39.95
Time Remaining: 9h 49m
RS O On3 On30 ARKANSAS VALLEY MODELS ROGERS PLUMBING  HEATING STRUCTURE KIT
RS O On3 On30 ARKANSAS VALLEY MODELS ROGERS PLUMBING HEATING STRUCTURE KIT
$50.95 (3 Bids)
Time Remaining: 11h 1m
ULRICH COLLECTION O SCALE 1 48 On3 MODEL T FORD OIL TANKER ALL METAL
ULRICH COLLECTION O SCALE 1 48 On3 MODEL T FORD OIL TANKER ALL METAL
$49.99
Time Remaining: 23h 11m
Buy It Now for only: $49.99
Logging Camp Cook House Kit Scale Model Masterpieces Yorke Fine HOn3 NEW
Logging Camp Cook House Kit Scale Model Masterpieces Yorke Fine HOn3 NEW
$51.65
Time Remaining: 23h 30m
Buy It Now for only: $51.65
Wiseman Model V 16 148 O Scale AHD Small Donkey Engine Kit On3On30 2 Spool
Wiseman Model V 16 148 O Scale AHD Small Donkey Engine Kit On3On30 2 Spool
$54.95
Time Remaining: 1d 8h 2m
O On3 On30 1 48 SCALE WISEMAN MODEL SERVICES JI CASE STEAM TRACTION ENGINE KIT
O On3 On30 1 48 SCALE WISEMAN MODEL SERVICES JI CASE STEAM TRACTION ENGINE KIT
$149.95
Time Remaining: 1d 22h 57m
Buy It Now for only: $149.95
ULRICH COLLECTION O SCALE 1 48 On3 MODEL T FORD BUS ALL METAL
ULRICH COLLECTION O SCALE 1 48 On3 MODEL T FORD BUS ALL METAL
$39.99
Time Remaining: 2d 4h 50m
Buy It Now for only: $39.99
O SCALE On3 On30 BANTA MODEL WORKS 6131 BO Hotel
O SCALE On3 On30 BANTA MODEL WORKS 6131 BO Hotel
$94.00
Time Remaining: 3d 51m
Buy It Now for only: $94.00
O SCALE On3 On30 BANTA MODEL WORKS bmw 149 O The Stock Pens
O SCALE On3 On30 BANTA MODEL WORKS bmw 149 O The Stock Pens
$138.00
Time Remaining: 3d 3h 51m
Buy It Now for only: $138.00
O SCALE On3 On30 WISEMAN MODEL SERVICES LOGGING OR MINING CAMP 4 CABIN SET KIT
O SCALE On3 On30 WISEMAN MODEL SERVICES LOGGING OR MINING CAMP 4 CABIN SET KIT
$89.95
Time Remaining: 4d 51m
Buy It Now for only: $89.95

Other On30 Scale train items recently purchased through this site:

Suncoast Models 004 148 O Scale Logging Camp Craftsman Kit On3On30
ULRICH COLLECTION O SCALE 1 48 On3 MODEL T FORD BUS ALL METAL
F G scale BANTA MODEL WORKS 8111 Roubies Saloon
Western Scale Models M 51 The Rowe Inclined Shaft Headframe Hoist House Kit
F G scale BANTA MODEL WORKS 8122 Sonnys Used Cars
RS O On3 On30 COLORADO SCALE MODELS 475 LEAVERITE MINE CRAFTSMAN KIT
G scale BANTA MODEL WORKS 8065 Crossing Shanty
Wiseman Model V 16 148 O Scale AHD Small Donkey Engine Kit On3On30 2 Spool
HO HOn3 WISEMAN MODEL SERVICES REA 15 HORSESHOE MEADOW DEPOT KIT FSM
Western Scale Models M16 Blacksmith Shop SEALED Kit O On3 0n30 1 4 Scale
O SCALE On3 On30 WISEMAN MODEL SERVICES LOGGING OR MINING CAMP 4 CABIN SET KIT
Boulder Valley Models 302 Enclosed Cab Dunkirk Geared Steam Locomotive
F G scale BANTA MODEL WORKS 8131 BO Hotel
O On30 On3 1915 FORD MODEL T Diecast 1 43 MIB
RIO GRANDE MODELS DRGW WATER CAR 0470
On3 On30 WISEMAN MODEL SERVICES NCNG SHORTY WHALEBACK TENDER KIT
RS O On3 On30 ARKANSAS VALLEY MODELS ROGERS PLUMBING HEATING STRUCTURE KIT
O SCALE On3 On30 WISEMAN MODEL SERVICES WESTMINSTER KEROSENE LOCOMOTIVE KIT
O SCALE WISEMAN MODEL SERVICES GRAND CENTRAL GOLD MINE INTERIOR KIT On3 On30
Morgan Hill Models MHM On30 O Scale Stone Water Tank w Shed Kit
O SCALE On3 On30 BANTA MODEL WORKS 6000 Joes Machine Shop
RS O On3 On30 ARKANSAS VALLEY MODELS 515 MILL CREEK MARKET STRUCTURE KIT
O SCALE On3 On30 BANTA MODEL WORKS 6065 Crossing Shanty
KMP Models O Scale Steam Powered Sawmill w Planer LumberLogging Interior MIB
O On3 On30 1 48 SCALE WISEMAN MODEL SERVICES JI CASE STEAM TRACTION ENGINE KIT