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'.

Dundas Models DM56 Festiniog Railway Granite End Door Wagon Pack of 5 T48
Dundas Models DM56 Festiniog Railway Granite End Door Wagon Pack of 5 T48
$39.71
Time Remaining: 10d 23h 41m
Buy It Now for only: $39.71
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
$37.50
Time Remaining: 10d 23h 42m
Buy It Now for only: $37.50

Other On30 Scale train items recently purchased through this site:

Dundas Models DM25 Festiniog Railway 2 Ton Steel Sided Slate Wagon 5 Pack T48
Dundas Models DM56 Festiniog Railway Granite End Door Wagon Pack of 5 T48