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

On30 Scale BUILT Stone Railroad Branch Line Depot w Rear scratch built addition
On30 Scale BUILT Stone Railroad Branch Line Depot w Rear scratch built addition
$135.00
Time Remaining: 5d 7h 32m
Buy It Now for only: $135.00
On30 Scale Ultimate Railroad Prototype Picture CD Collection Set 25000+ images
On30 Scale Ultimate Railroad Prototype Picture CD Collection Set 25000+ images
$99.99
Time Remaining: 21d 6h 55m
Buy It Now for only: $99.99

Other On30 Scale train items recently purchased through this site:

On30 Scale Ultimate Railroad Prototype Picture CD Collection Set 25000+ images
On30 Scale BUILT Stone Railroad Branch Line Depot w Rear scratch built addition