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

Beautiful custom weathered Logging Truck O scale or small G scale lot 24
Beautiful custom weathered Logging Truck O scale or small G scale lot 24
$147.00
Time Remaining: 21h 1m
Kato N Gauge 10 1436 Hankyu 6300 Type with Small Window 8 Cars Set
Kato N Gauge 10 1436 Hankyu 6300 Type with Small Window 8 Cars Set
$232.83
Time Remaining: 4d 9h 6m
Buy It Now for only: $232.83
O scale or small 1 24 G scale Logging Truck custom weathered lot 0
O scale or small 1 24 G scale Logging Truck custom weathered lot 0
$146.00
Time Remaining: 4d 23h 7m
On3 On30 WISEMAN MODEL SERVICES COLORADO  SOUTHERN PASSENGER COACH 70 KIT
On3 On30 WISEMAN MODEL SERVICES COLORADO SOUTHERN PASSENGER COACH 70 KIT
$99.95
Time Remaining: 16d 9h
Buy It Now for only: $99.95
Logging Crane small Log Loading crane for a loading dock or flatcar HO BUILT UP
Logging Crane small Log Loading crane for a loading dock or flatcar HO BUILT UP
$49.99
Time Remaining: 27d 15h 57m
Buy It Now for only: $49.99

Other On30 Scale train items recently purchased through this site:

O scale or small 1 24 G scale Logging Truck custom weathered lot 0
Logging Crane small Log Loading crane for a loading dock or flatcar HO BUILT UP
Beautiful custom weathered Logging Truck O scale or small G scale lot 24
On3 On30 WISEMAN MODEL SERVICES COLORADO SOUTHERN PASSENGER COACH 70 KIT
Kato N Gauge 10 1436 Hankyu 6300 Type with Small Window 8 Cars Set