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 scale'.

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 32m
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 42m
Buy It Now for only: $132.00
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: 7h 52m
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: 7h 52m
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 2m
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 19m
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 1m
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 20m
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 7h 52m
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 47m
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 40m
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 41m
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 41m
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 41m
Buy It Now for only: $89.95
O SCALE On3 On30 BANTA MODEL WORKS 6000 Joes Machine Shop
O SCALE On3 On30 BANTA MODEL WORKS 6000 Joes Machine Shop
$54.00
Time Remaining: 4d 5h 6m
Buy It Now for only: $54.00
O SCALE On3 On30 BANTA MODEL WORKS 724 Farmers Table Saw
O SCALE On3 On30 BANTA MODEL WORKS 724 Farmers Table Saw
$26.00
Time Remaining: 4d 5h 6m
Buy It Now for only: $26.00
Logging Camp Portable Bunk House Kits Thomas Yorke Scale Model Masterpieces HOn3
Logging Camp Portable Bunk House Kits Thomas Yorke Scale Model Masterpieces HOn3
$42.25
Time Remaining: 4d 5h 28m
Buy It Now for only: $42.25
Morgan Hill Models MHM On30 O Scale Stone Water Tank w Shed Kit
Morgan Hill Models MHM On30 O Scale Stone Water Tank w Shed Kit
$84.95
Time Remaining: 4d 7h 52m
KMP Models O On30 Scale Craftsman Logging Kit Spar Tree Model Trains New
KMP Models O On30 Scale Craftsman Logging Kit Spar Tree Model Trains New
$56.95
Time Remaining: 4d 19h 57m
Buy It Now for only: $56.95
KMP Models O On30 Scale Craftsman Logging Kit Steam Sawmill with Planer New
KMP Models O On30 Scale Craftsman Logging Kit Steam Sawmill with Planer New
$179.00
Time Remaining: 4d 19h 57m
Buy It Now for only: $179.00
West side  Pacific Traction Pacific Fast Mail Balboa Scale Models Fomras
West side Pacific Traction Pacific Fast Mail Balboa Scale Models Fomras
$500.00
Time Remaining: 5d 4h 24m
Buy It Now for only: $700.00

Other On30 Scale train items recently purchased through this site:

Suncoast Models 004 148 O Scale Logging Camp Craftsman Kit On3On30
F G scale BANTA MODEL WORKS 8111 Roubies Saloon
O SCALE WISEMAN MODEL SERVICES GRAND CENTRAL GOLD MINE INTERIOR KIT On3 On30
KMP Models O On30 Scale Craftsman Logging Kit Steam Sawmill with Planer New
Western Scale Models M 51 The Rowe Inclined Shaft Headframe Hoist House Kit
F G scale BANTA MODEL WORKS 8131 BO Hotel
G scale BANTA MODEL WORKS 8065 Crossing Shanty
RS O On3 On30 COLORADO SCALE MODELS 475 LEAVERITE MINE CRAFTSMAN KIT
F G scale BANTA MODEL WORKS 8122 Sonnys Used Cars
F G scale BANTA MODEL WORKS 8108 Donkey Corners Depot
O SCALE On3 On30 BANTA MODEL WORKS 6153 Oakboro Hay Grain
KMP Models O Scale Steam Powered Sawmill w Planer LumberLogging Interior MIB
F G scale BANTA MODEL WORKS 8144 Lineside Tool Shed
O SCALE On3 On30 WISEMAN MODEL SERVICES LOGGING OR MINING CAMP 4 CABIN SET KIT
RS O On3 On30 SEQUOIA SCALE MODELS BRANCHLINE SAND HOUSE AND BUCKET CRANE KIT
O On3 On30 1 48 SCALE WISEMAN MODEL SERVICES JI CASE STEAM TRACTION ENGINE KIT
O SCALE 1 48 On3 On30 WISEMAN MODEL SERVICES HOLT 75 CRAWLER TRACTOR KIT
Logging Camp Cook Bunk House Set Thomas Yorke Scale Model Masterpieces On3 NEW
Western Scale Models M16 Blacksmith Shop SEALED Kit O On3 0n30 1 4 Scale
O SCALE On3 On30 BANTA MODEL WORKS 6131 BO Hotel
O SCALE On3 On30 BANTA MODEL WORKS 6145 Doc Holidays Apothecary
Wiseman Model V 16 148 O Scale AHD Small Donkey Engine Kit On3On30 2 Spool
O SCALE On3 On30 BANTA MODEL WORKS bmw 149 O The Stock Pens
S SCALE Sn3 WISEMAN MODEL SERVICES AHD 2 SPOOL LOGGING DONKEY ENGINE WINCH KIT
O SCALE 1 48 On3 On30 WISEMAN MODEL SERVICES AMB 502 BATES BULLDOZER KIT