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

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: 50m
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: 6h 43m
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: 1d 2h 44m
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: 1d 5h 44m
Buy It Now for only: $138.00
Logging Camp Cook House Kit Scale Model Masterpieces Yorke Fine HOn3 NEW
Logging Camp Cook House Kit Scale Model Masterpieces Yorke Fine HOn3 NEW
$54.95
Time Remaining: 1d 5h 54m
Buy It Now for only: $54.95
Logging Camp Portable Bunk House Kits Thomas Yorke Scale Model Masterpieces HOn3
Logging Camp Portable Bunk House Kits Thomas Yorke Scale Model Masterpieces HOn3
$44.95
Time Remaining: 1d 10h 11m
Buy It Now for only: $44.95
Historic Logging Truck custom weathered O or On30 scale lot 6
Historic Logging Truck custom weathered O or On30 scale lot 6
$89.00
Time Remaining: 1d 11h 30m
Buy It Now for only: $89.00
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 11h 30m
Buy It Now for only: $118.00
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: 2d 2h 44m
Buy It Now for only: $89.95
Logging Camp Cook Bunk House Set Thomas Yorke Scale Model Masterpieces On3 NEW
Logging Camp Cook Bunk House Set Thomas Yorke Scale Model Masterpieces On3 NEW
$149.95
Time Remaining: 2d 4h 21m
Buy It Now for only: $149.95
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: 2d 7h 8m
Buy It Now for only: $26.00
Scale Model Masterpieces Yorke Logging Camp Cook House Kit HO SMM011
Scale Model Masterpieces Yorke Logging Camp Cook House Kit HO SMM011
$52.20
Time Remaining: 3d 5h 31m
Buy It Now for only: $52.20
Scale Model Masterpieces Yorke Logging Camp Portable Bunk House Kit SMM011
Scale Model Masterpieces Yorke Logging Camp Portable Bunk House Kit SMM011
$42.70
Time Remaining: 3d 5h 31m
Buy It Now for only: $42.70
Scale Model Masterpieces Yorke Logging Camp Cook Bunk House Set SMM011
Scale Model Masterpieces Yorke Logging Camp Cook Bunk House Set SMM011
$142.45
Time Remaining: 3d 5h 47m
Buy It Now for only: $142.45
Scale Model Masterpieces Yorke Logging Camp Cook House Kit HO SMM022
Scale Model Masterpieces Yorke Logging Camp Cook House Kit HO SMM022
$54.95
Time Remaining: 4d 1h 38m
Buy It Now for only: $54.95
Scale Model Masterpieces Yorke Logging Camp Portable Bunk House Kit SMM022
Scale Model Masterpieces Yorke Logging Camp Portable Bunk House Kit SMM022
$44.95
Time Remaining: 4d 1h 38m
Buy It Now for only: $44.95
Scale Model Masterpieces Yorke Logging Camp Cook Bunk House Set SMM022
Scale Model Masterpieces Yorke Logging Camp Cook Bunk House Set SMM022
$149.95
Time Remaining: 4d 1h 47m
Buy It Now for only: $149.95
On30 or O scale very rare Caterpillar Tractor Logging Diorama custom weathered
On30 or O scale very rare Caterpillar Tractor Logging Diorama custom weathered
$175.00
Time Remaining: 4d 4h 21m
O scale or On30 scale Logging Truck from the 1900s custom weathered lot 6
O scale or On30 scale Logging Truck from the 1900s custom weathered lot 6
$98.00
Time Remaining: 4d 4h 21m
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: 4d 4h 21m
Rare O Scale On3 RaggstoRiches Dolores Colorado Conoco Plant NIB
Rare O Scale On3 RaggstoRiches Dolores Colorado Conoco Plant NIB
$295.00
Time Remaining: 4d 4h 29m

Other On30 Scale train items recently purchased through this site:

Peco SL E596 Medium Radius Left Turnout Nickel Silver 0 165 NarrowOn30 Scale
Scale Model Masterpieces Yorke Logging Camp Portable Bunk House Kits HO
WNC Scale LogsLot 2A 44 logs on30 O scale the usual extras
PRECISION SCALE CO PK 608 HOn3 DRGW 30 REFRIGERATOR NIB
HARTFORD PRODUCTS MUSEUM QUALITY 1203 SCALE KIT PARTS PLANS
HARTFORD PRODUCTS FOUR 1203 SCALE ARCHBAR TRUCKS 26 DIA WHEELS
HARTFORD PRODUCTS FOUR T 10 1203 SCALE WEST SIDE LUMBER CO 4 FT TRUCK KITS
1 48 O SCALE On3 On30 WISEMAN MODEL SERVICES FORDSON STYLE FARM TRACTOR KIT
RS Laser Kits 1031 O O Scale 1880s Old Town Shop Craftsman Kit
Scale Model Masterpieces Yorke Logging Camp Cook Bunk House Set SMM02
Scale Model Masterpieces Yorke Logging Camp Cook House Kit HO SMM03
Rare O Scale On3 RaggstoRiches Dolores Colorado Conoco Plant NIB
Nn3 Scale Class B Shay Frame by Showcase Miniatures 5013
O SCALE On3 On30 BANTA MODEL WORKS 6065 Crossing Shanty
Peco SL E1495 Streamline Right Hand Turnout Switch Medium HOm 12mm Gauge Scale
O SCALE On3 On30 BANTA MODEL WORKS 724 Farmers Table Saw
Peco SL E1487 Streamline Curved Left Hand Turnout Switch HOm 12mm Gauge Scale
Peco SL E1486 Streamline Curved Right Hand Turnout Switch HOm 12mm Gauge Scale
ULRICH COLLECTION O SCALE 1 48 On3 MODEL T FORD BUS ALL METAL
F G scale BANTA MODEL WORKS 8111 Roubies Saloon
O SCALE On3 On30 BANTA MODEL WORKS 6126 Blacksmith Shop Annex Barn
Bachmann Spectrum On30 Scale Rail Truck Colorado Mining Co DCC
Arnold N Scale 7097 Lighting Generator New in Original Box
Lot of 4 Peco SL E1496 Left Hand Turnout Switch Medium HOm 12mm Gauge Scale
O SCALE 1 48 On3 On30 WISEMAN MODEL SERVICES AMB 502 BATES BULLDOZER KIT