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 railways'.

Kato Japan 14 503 1 Chibi Den Streetcar Tram Train N scale Railway model
Kato Japan 14 503 1 Chibi Den Streetcar Tram Train N scale Railway model
$52.39
Time Remaining: 10d 16h 34m
Buy It Now for only: $52.39
Katsumi KTM HO Gauge Series 0 Shinkansen Railway Model Vintage Toy For Parts
Katsumi KTM HO Gauge Series 0 Shinkansen Railway Model Vintage Toy For Parts
$699.99
Time Remaining: 13d 9h 26m
Buy It Now for only: $699.99
Katsumi KTM HO gauge Moha 111 Yokosuka color railway model vintage toy For parts
Katsumi KTM HO gauge Moha 111 Yokosuka color railway model vintage toy For parts
$129.99
Time Remaining: 13d 9h 26m
Buy It Now for only: $129.99
Dundas Models DM25 Festiniog Railway 2 Ton Steel Sided Slate Wagon 5 Pack T48
Dundas Models DM25 Festiniog Railway 2 Ton Steel Sided Slate Wagon 5 Pack T48
$36.74
Time Remaining: 13d 16h 44m
Buy It Now for only: $36.74
BUILT Model Railways laser cut Classic Wood Freight Depot HO
BUILT Model Railways laser cut Classic Wood Freight Depot HO
$45.00
Time Remaining: 18d 16h 2m
Buy It Now for only: $45.00
KATO N gauge Rhaetian Railway Bernina Express Basic 5 car set 10 1318 model of
KATO N gauge Rhaetian Railway Bernina Express Basic 5 car set 10 1318 model of
$196.05
Time Remaining: 22d 22h 16m
Buy It Now for only: $196.05
Kato HO Gauge HO AC Adapter for 22 083 Railway Model Supplies
Kato HO Gauge HO AC Adapter for 22 083 Railway Model Supplies
$40.10
Time Remaining: 22d 22h 16m
Buy It Now for only: $40.10
Railway Post Office Baggage Car Tokaido Sanyo 6 Car Set Model Train by
Railway Post Office Baggage Car Tokaido Sanyo 6 Car Set Model Train by
$178.49
Time Remaining: 22d 22h 17m
Buy It Now for only: $178.49
Kato N Gauge E235 Series Yamanote Line Basic Set 4 Both 10 1468 Railway Model
Kato N Gauge E235 Series Yamanote Line Basic Set 4 Both 10 1468 Railway Model
$137.97
Time Remaining: 22d 22h 17m
Buy It Now for only: $137.97
Kato N Gauge Smart Controller AC Adapter not included 22 019 Railway Model Sup
Kato N Gauge Smart Controller AC Adapter not included 22 019 Railway Model Sup
$149.33
Time Remaining: 22d 22h 17m
Buy It Now for only: $149.33
Rare railway model HO gauge KATSUMI Moha 484 Kuha 481 form rail F S
Rare railway model HO gauge KATSUMI Moha 484 Kuha 481 form rail F S
$600.00
Time Remaining: 26d 15h 3m
Buy It Now for only: $600.00

Other On30 Scale train items recently purchased through this site:

BUILT Model Railways laser cut Classic Wood Freight Depot HO
Kato Japan 14 503 1 Chibi Den Streetcar Tram Train N scale Railway model
Kato HO Gauge HO AC Adapter for 22 083 Railway Model Supplies
KATO N gauge Rhaetian Railway Bernina Express Basic 5 car set 10 1318 model of
Katsumi KTM HO Gauge Series 0 Shinkansen Railway Model Vintage Toy For Parts
Railway Post Office Baggage Car Tokaido Sanyo 6 Car Set Model Train by
Kato N Gauge E235 Series Yamanote Line Basic Set 4 Both 10 1468 Railway Model
Dundas Models DM25 Festiniog Railway 2 Ton Steel Sided Slate Wagon 5 Pack T48
Kato N Gauge Smart Controller AC Adapter not included 22 019 Railway Model Sup
Katsumi KTM HO gauge Moha 111 Yokosuka color railway model vintage toy For parts
Rare railway model HO gauge KATSUMI Moha 484 Kuha 481 form rail F S