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'.

KATO N gauge 87 series TWILIGHT EXPRESS Ruifu 10 Car Set 10 1570 Diesel Car
KATO N gauge 87 series TWILIGHT EXPRESS Ruifu 10 Car Set 10 1570 Diesel Car
$349.90
Time Remaining: 19h 45m
Buy It Now for only: $349.90
Narrow Gauge H0e System Dimensions 57 1 8in x 31 1 2in only Pick Up with Very
Narrow Gauge H0e System Dimensions 57 1 8in x 31 1 2in only Pick Up with Very
$608.06
Time Remaining: 20h 12m
Buy It Now for only: $608.06
Joe Works H0n30 0 6 0T Porter boxed unmade brass kit  H0e narrow gauge
Joe Works H0n30 0 6 0T Porter boxed unmade brass kit H0e narrow gauge
$233.24
Time Remaining: 1d 1h 40m
KATO N gauge diesel train 58 based non air conditioned car express good at 7 Car
KATO N gauge diesel train 58 based non air conditioned car express good at 7 Car
$208.64
Time Remaining: 1d 2h 41m
Buy It Now for only: $208.64
KATO N gauge 12 based express shaped passenger railway specification 6 Car Set 1
KATO N gauge 12 based express shaped passenger railway specification 6 Car Set 1
$155.24
Time Remaining: 1d 2h 41m
Buy It Now for only: $155.24
O S Wiseman Models Metal Engine Kits Narrow Gauge
O S Wiseman Models Metal Engine Kits Narrow Gauge
$40.00
Time Remaining: 1d 9h 24m
KATO N gauge 209 based 500 series PS28 equipped Ch Sbu Line Basic 6 Car Set 1
KATO N gauge 209 based 500 series PS28 equipped Ch Sbu Line Basic 6 Car Set 1
$277.40
Time Remaining: 1d 22h 25m
Buy It Now for only: $277.40
NARROW GAUGE LOCO SHED LIGHTED O SCALE UNIQUE ITEM
NARROW GAUGE LOCO SHED LIGHTED O SCALE UNIQUE ITEM
$36.99
Time Remaining: 2d 2h 37m
Bachmann SPIRIT AMERICA 2 6 0 Mogul Steam Locomotive TRAIN SET On30 NARROW GAUGE
Bachmann SPIRIT AMERICA 2 6 0 Mogul Steam Locomotive TRAIN SET On30 NARROW GAUGE
$99.99
Time Remaining: 2d 14h
AHM Minikits Narrow Gauge Engine Shed Weathered Painted and Lighted
AHM Minikits Narrow Gauge Engine Shed Weathered Painted and Lighted
$28.00
Time Remaining: 2d 15h 54m
Scratch Built On30 Gauge Trestle Bridge w Rails
Scratch Built On30 Gauge Trestle Bridge w Rails
$59.95
Time Remaining: 3d 7h 41m
Buy It Now for only: $59.95
Busch 34004 Tt Gauge Bauzugaufenthaltswagen MCi 43New Original Packaging
Busch 34004 Tt Gauge Bauzugaufenthaltswagen MCi 43New Original Packaging
$39.09
Time Remaining: 3d 20h 17m
Buy It Now for only: $39.09
Busch 32000 Tt Gauge Luggage Car Pwi 93  New Original Packaging
Busch 32000 Tt Gauge Luggage Car Pwi 93 New Original Packaging
$39.09
Time Remaining: 3d 20h 32m
Buy It Now for only: $39.09
H0n30 7mm Narrow Gauge Etched Brass Body for Bachmann HO 70 tonner Kit No 702
H0n30 7mm Narrow Gauge Etched Brass Body for Bachmann HO 70 tonner Kit No 702
$25.22
Time Remaining: 4d 7h 7m
Buy It Now for only: $25.22
Varian 0572 K7360 301 Ionization Gauge
Varian 0572 K7360 301 Ionization Gauge
$129.99
Time Remaining: 5d 3h 20m
Buy It Now for only: $129.99
3 105 HO Gauge Unitrack HM1 R670 Endless Track Basic Set
3 105 HO Gauge Unitrack HM1 R670 Endless Track Basic Set
$152.33
Time Remaining: 5d 5h 19m
Buy It Now for only: $152.33
KATO N gauge old form passenger 4 Car Set tea 10 034 model railroad passenger c
KATO N gauge old form passenger 4 Car Set tea 10 034 model railroad passenger c
$103.77
Time Remaining: 5d 5h 19m
Buy It Now for only: $103.77
Kato N Gauge E231 System 0 Series Ch   S bu Line 6 Both Basic Set 10 1520 M
Kato N Gauge E231 System 0 Series Ch S bu Line 6 Both Basic Set 10 1520 M
$173.80
Time Remaining: 5d 5h 44m
Buy It Now for only: $173.80
Kato N Gauge E231 System 0 Series Ch   S bu Line 4 Both hematopoiesis Set 1
Kato N Gauge E231 System 0 Series Ch S bu Line 4 Both hematopoiesis Set 1
$95.47
Time Remaining: 5d 5h 46m
Buy It Now for only: $95.47
KATO N gauge DE10 JR Kyushu specification 2 Car Set Special product 10 1534 mode
KATO N gauge DE10 JR Kyushu specification 2 Car Set Special product 10 1534 mode
$288.48
Time Remaining: 5d 9h 24m
Buy It Now for only: $288.48
KATO N gauge 701 based 1000 series Sendai color 4 Car Set 10 1553 model railroa
KATO N gauge 701 based 1000 series Sendai color 4 Car Set 10 1553 model railroa
$181.64
Time Remaining: 5d 18h 21m
Buy It Now for only: $181.64

Other On30 Scale train items recently purchased through this site:

O S Wiseman Models Metal Engine Kits Narrow Gauge
Scratch Built On30 Gauge Trestle Bridge w Rails
BTS 17143 On30 Laser Cut Narrow Gauge Cheat Run Trestle Craftsman Building
AHM Minikits Narrow Gauge Engine Shed Weathered Painted and Lighted
Bachmann SPIRIT AMERICA 2 6 0 Mogul Steam Locomotive TRAIN SET On30 NARROW GAUGE
NEVADA CENTRAL Sagebrush Narrow Gauge Out of Print NEW BOOK
Hangman Creek Lumber Company DVD HO HOn3 S Sn3 O On3 On30 Narrow Gauge
Peco SL 500 On30 Narrow Gauge Mainline Plastic Tie Flex Track Code 100
BUDWEISER CABOOSE HAWTHORNE VILLAGE NARROW GAUGE On30 Scale Train MINT
Varian 0572 K7360 301 Ionization Gauge
Narrow Gauge LOMBARD Log Hauler Finished Model HOn3 HO Scale Craftsman model
The Two Foot Gauge Enigma Beira Railway 1890 1900 by A Baxter
42 SRRL Narrow Gauge Railway photographs Maine Narrow Gauge Moody
Cagneys Locomotive Works Miniature Railroad Supplier Narrow Gauge
COCA COLA COKE CABOOSE HAWTHORNE VILLAGE NARROW GAUGE On30 Train MINT
Narrow Gauge and Shoreline Gazette 8 Issues great condition
Narrow Gauge Through the Bush Ontarios Toronto Grey Bruce and Nipissing
KATO N gauge 923 form 3000 series Doctor Yellow hematopoiesis 4 Car Set 10 897 m
Twenty Four Inches Apart The Two Foot Gauge Railways of the Cape of Good Hope
KATO N gauge 12 based express shaped passenger railway specification 6 Car Set 1
NARROW GAUGE LOCO SHED LIGHTED O SCALE UNIQUE ITEM
H0n30 7mm Narrow Gauge Etched Brass Body for Bachmann HO 70 tonner Kit No 702
Busch 51553 Gauge H0 Ifa G5 59 Tank Truck 1550 Benzintankwagen Minol Nip
Busch 31169 Tt Gauge Flat Wagon Samm 4818 Dr New Original Packaging
Namib Narrow Gauge Sydney M Moire HT Crittenden