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 model trains'.

O S Wiseman Models Metal Engine Kits Narrow Gauge
O S Wiseman Models Metal Engine Kits Narrow Gauge
$40.00
Time Remaining: 1d 8h 55m
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: 9d 10h 38m
Buy It Now for only: $600.00

Other On30 Scale train items recently purchased through this site:

O S Wiseman Models Metal Engine Kits Narrow Gauge
Rare railway model HO gauge KATSUMI Moha 484 Kuha 481 form rail F S