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

The No Frills Prototype Picture Guide to Modeling Ore Mines  Mills 5 Disc Set
The No Frills Prototype Picture Guide to Modeling Ore Mines Mills 5 Disc Set
$29.99
Time Remaining: 3d 14h 18m
Buy It Now for only: $29.99
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
$397.40
Time Remaining: 4d 15h 9m
Buy It Now for only: $397.40
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
$141.30
Time Remaining: 4d 22h 5m
Buy It Now for only: $141.30
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
$281.57
Time Remaining: 5d 17h 49m
Buy It Now for only: $281.57
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: 6d 3h 39m
Buy It Now for only: $89.95
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: 6d 9h 24m
On30HO Side Dump Wagons Mining car Ore Erz Car x 3pcs 3 Stck set per box
On30HO Side Dump Wagons Mining car Ore Erz Car x 3pcs 3 Stck set per box
$69.00
Time Remaining: 7d 12h 46m
Buy It Now for only: $69.00
BACHMANN HAWTHORNE VILLAGE SPIRIT OF AMERICA TRAIN SET LARGE SET
BACHMANN HAWTHORNE VILLAGE SPIRIT OF AMERICA TRAIN SET LARGE SET
$425.00
Time Remaining: 8d 23h 53m
Buy It Now for only: $425.00
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: 9d 43m
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: 9d 43m
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: 9d 1h 8m
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: 9d 1h 10m
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
$261.24
Time Remaining: 9d 4h 48m
Buy It Now for only: $261.24
Hawthorn Village Coca Cola  Wherever Santa Goes train set in original boxes
Hawthorn Village Coca Cola Wherever Santa Goes train set in original boxes
$275.00
Time Remaining: 9d 13h 21m
Buy It Now for only: $275.00
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: 9d 13h 45m
Buy It Now for only: $181.64
Kato 10 812 Series 24 Sleeper Express Yuzuru 6 Car Add on Set
Kato 10 812 Series 24 Sleeper Express Yuzuru 6 Car Add on Set
$141.38
Time Remaining: 9d 13h 45m
Buy It Now for only: $141.38
Kato 10 1447 Type E001 Train Suite Shikishima 10 Cars Set N scale Japan
Kato 10 1447 Type E001 Train Suite Shikishima 10 Cars Set N scale Japan
$529.31
Time Remaining: 9d 13h 45m
Buy It Now for only: $529.31
10 1548 20 Series Car Train Kyushu 13 Car Set Specially Planned Item
10 1548 20 Series Car Train Kyushu 13 Car Set Specially Planned Item
$274.00
Time Remaining: 9d 13h 45m
Buy It Now for only: $274.00
Double Track Attachment Set for Automatic Crossing Gate S Model Train
Double Track Attachment Set for Automatic Crossing Gate S Model Train
$70.05
Time Remaining: 9d 13h 45m
Buy It Now for only: $70.05
Kato KAT23125 N Viaduct Station
Kato KAT23125 N Viaduct Station
$148.05
Time Remaining: 9d 13h 45m
Buy It Now for only: $148.05
Kato N Gauge E235 Series Yamanote Line hematopoiesis Set A 4 Both 10 1469 Rail
Kato N Gauge E235 Series Yamanote Line hematopoiesis Set A 4 Both 10 1469 Rail
$112.08
Time Remaining: 9d 13h 45m
Buy It Now for only: $112.08

Other On30 Scale train items recently purchased through this site:

Minitrains HOn30 Lot 995093 Seven pc Freight Set
1950S ARROW SAGO BATTERY OPERATED TRAIN SET SANTA FE CHIEF AA46
DRGW Locomotives 15mm F 1203 Model Railroad Water Slide Decal Set SJD254
Hawthorne Village Bachmann Spirit Of America On30 Scale Train Set Complete
RGS Sunrise Locomotive 15mm F 1203 Model Railroad Water Slide Decal Set SJD255
The No Frills Prototype Picture Guide to Modeling Ore Mines Mills 5 Disc Set
O SCALE On3 On30 WISEMAN MODEL SERVICES LOGGING OR MINING CAMP 4 CABIN SET KIT
BACHMANN HAWTHORNE VILLAGE SPIRIT OF AMERICA TRAIN SET LARGE SET
BACHMANN HAWTHORNE VILLAGE SPIRIT OF AMERICA TRAIN SET 13 PC COMPLETE LARGE SET
BACHMANN HAWTHORNE VILLAGE SPIRIT OF AMERICA TRAIN SET 10 PC COMPLETE LARGE MIB
Hawthorn Village Coca Cola Wherever Santa Goes train set in original boxes
Bachmann SPIRIT AMERICA 2 6 0 Mogul Steam Locomotive TRAIN SET On30 NARROW GAUGE
KATO N gauge Chibi convex set the countryside of the city of freight train 3d3
N E5 Shinkansen Basic Set Hayabusa Falcon 3
KATO N gauge endless line basic set master 1 20 852 model railroad rail set
KATO N gauge 923 form 3000 series Doctor Yellow hematopoiesis 4 Car Set 10 897 m
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 4 Both hematopoiesis Set 1
KATO N gauge ICE4 7 both basic set 10 1512 model railroad train
KATO N gauge 251 based super view Dancer appeared during coating 10 Car Set S
KATO N gauge UP Water Tender 2 Car Set 10 706 3 model railroad steam locomotive
KATO N gauge 201 based center line color T organized 6 both basic set 10 1551 mo
KATO N gauge old form passenger 4 Car Set tea 10 034 model railroad passenger c
Series E6 Akita Shinkansen Super Komachi Basic 3 Car Set Model Train by K
Kato N Scale Unitrack Rural Station Set