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 railroad gauge'.

On30 Model Railroad Depot BUILT w Platform Narrow Gauge Backwoods Depot
On30 Model Railroad Depot BUILT w Platform Narrow Gauge Backwoods Depot
$158.00
Time Remaining: 5d 5h 34m
Buy It Now for only: $158.00
On30 BUILT Model Railroad Depot w Platform Narrow Gauge Backwoods Passenger Depo
On30 BUILT Model Railroad Depot w Platform Narrow Gauge Backwoods Passenger Depo
$150.00
Time Remaining: 5d 5h 35m
Buy It Now for only: $150.00
On30 Stone Model Railroad Building BUILT Millwork Included Narrow Gauge Railroa
On30 Stone Model Railroad Building BUILT Millwork Included Narrow Gauge Railroa
$65.00
Time Remaining: 5d 6h 13m
Buy It Now for only: $65.00
On30 Model Railroad Hotel Built Finished Lighted Narrow Gauge Model Railroad Bld
On30 Model Railroad Hotel Built Finished Lighted Narrow Gauge Model Railroad Bld
$120.00
Time Remaining: 5d 6h 14m
Buy It Now for only: $120.00
On30 Model Railroad Building Built  Painted On30 Narrow Gauge Blacksmith Shop
On30 Model Railroad Building Built Painted On30 Narrow Gauge Blacksmith Shop
$100.00
Time Remaining: 5d 6h 15m
Buy It Now for only: $100.00

Other On30 Scale train items recently purchased through this site:

On30 BUILT Model Railroad Depot w Platform Narrow Gauge Backwoods Passenger Depo
On30 Model Railroad Depot BUILT w Platform Narrow Gauge Backwoods Depot
On30 Model Railroad Building Built Painted On30 Narrow Gauge Blacksmith Shop
On30 Model Railroad Hotel Built Finished Lighted Narrow Gauge Model Railroad Bld
On30 Stone Model Railroad Building BUILT Millwork Included Narrow Gauge Railroa