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

KATO N gauge 251 based super view Dancer appeared during coating 10 Car Set S
KATO N gauge 251 based super view Dancer appeared during coating 10 Car Set S
$275.67
Time Remaining: 1d 11h 55m
Buy It Now for only: $275.67
Bachmann On30 Scale Train Set Analog Norman RockwellS American Christmas 25023
Bachmann On30 Scale Train Set Analog Norman RockwellS American Christmas 25023
$276.45
Time Remaining: 3d 2h 18m
Buy It Now for only: $276.45
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: 19d 9h 52m
Buy It Now for only: $70.05
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: 19d 9h 53m
Buy It Now for only: $95.47
Unitrack Automatic Crossing Gate S Basic Set Model Train by Kato
Unitrack Automatic Crossing Gate S Basic Set Model Train by Kato
$186.19
Time Remaining: 19d 9h 53m
Buy It Now for only: $186.19
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: 19d 9h 53m
Buy It Now for only: $173.80
10 1572 Shinano Railway 115 Series Shounan Color Yokosuka Color 6Car Set S
10 1572 Shinano Railway 115 Series Shounan Color Yokosuka Color 6Car Set S
$250.82
Time Remaining: 19d 9h 53m
Buy It Now for only: $250.82
Kato HO Gauge HV 21 HO Uni Track Automatic Traffic Signal S Set 3 131 Japan
Kato HO Gauge HV 21 HO Uni Track Automatic Traffic Signal S Set 3 131 Japan
$139.80
Time Remaining: 19d 9h 53m
Buy It Now for only: $139.80

Other On30 Scale train items recently purchased through this site:

Bachmann On30 Scale Train Set Analog Norman RockwellS American Christmas 25023
KATO N gauge 251 based super view Dancer appeared during coating 10 Car Set S
Unitrack Automatic Crossing Gate S Basic Set Model Train by Kato
Kato HO Gauge HV 21 HO Uni Track Automatic Traffic Signal S Set 3 131 Japan
Kato N Gauge E231 System 0 Series Ch S bu Line 4 Both hematopoiesis Set 1
Double Track Attachment Set for Automatic Crossing Gate S Model Train
10 1572 Shinano Railway 115 Series Shounan Color Yokosuka Color 6Car Set S
Kato N Gauge E231 System 0 Series Ch S bu Line 6 Both Basic Set 10 1520 M