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 trains'.

Overland Models HO brass AH Gopher Crane on treads unpainted NR
Overland Models HO brass AH Gopher Crane on treads unpainted NR
$374.99
Time Remaining: 3d 9h 47m
Overland Models HO HOn3 brass AH Log Loader w base unpainted NR
Overland Models HO HOn3 brass AH Log Loader w base unpainted NR
$474.99
Time Remaining: 3d 9h 47m
Built O On3 Cumbres Depot Structure Kit American Models Laserkit
Built O On3 Cumbres Depot Structure Kit American Models Laserkit
$295.00
Time Remaining: 6d 3h 39m
Buy It Now for only: $295.00
Sn3 CRAFTSMAN ANVIL MOUNTAIN MODELS RED MOUNTAIN JAIL KIT NEW
Sn3 CRAFTSMAN ANVIL MOUNTAIN MODELS RED MOUNTAIN JAIL KIT NEW
$35.95
Time Remaining: 6d 8h 5m
Buy It Now for only: $35.95
O On3 On30 WESTERN SCALE MODELS M 5 JAMISON CREEK HYDRO ELECTRIC POWER STATION
O On3 On30 WESTERN SCALE MODELS M 5 JAMISON CREEK HYDRO ELECTRIC POWER STATION
$99.95
Time Remaining: 6d 11h 30m
ON3 ON30 SILVER CITY MODELS DRGW 1872 17 4 WHEEL GONDOLA CAR KIT
ON3 ON30 SILVER CITY MODELS DRGW 1872 17 4 WHEEL GONDOLA CAR KIT
$26.00
Time Remaining: 6d 19h 7m
Buy It Now for only: $26.00
ON3 ON30 SILVER CITY MODELS DRGW 1872 14 4 WHEEL GONDOLA CAR KIT
ON3 ON30 SILVER CITY MODELS DRGW 1872 14 4 WHEEL GONDOLA CAR KIT
$26.00
Time Remaining: 7d 1h 25m
Buy It Now for only: $26.00
HALLMARK MODELS HOn3 BRASS EAST BROARD TOP 3 BAY STEEL HOPPER CAR
HALLMARK MODELS HOn3 BRASS EAST BROARD TOP 3 BAY STEEL HOPPER CAR
$74.00
Time Remaining: 15d 11h 45m
Buy It Now for only: $74.00
BLACKSMITH SHOP WITH DETAILS HO HON30 HON3 KIT 4010 SEQUOIA MODELS
BLACKSMITH SHOP WITH DETAILS HO HON30 HON3 KIT 4010 SEQUOIA MODELS
$25.99
Time Remaining: 17d 8h 6m
Buy It Now for only: $25.99
On3 On30 WISEMAN MODELS SM 102 DRGW OPEN PLATFORM COMBINE PASSENGER CAR
On3 On30 WISEMAN MODELS SM 102 DRGW OPEN PLATFORM COMBINE PASSENGER CAR
$89.95
Time Remaining: 25d 4h 8m
Buy It Now for only: $89.95

Other On30 Scale train items recently purchased through this site:

O On3 On30 WESTERN SCALE MODELS M 5 JAMISON CREEK HYDRO ELECTRIC POWER STATION
HALLMARK MODELS HOn3 BRASS EAST BROARD TOP 3 BAY STEEL HOPPER CAR
BLACKSMITH SHOP WITH DETAILS HO HON30 HON3 KIT 4010 SEQUOIA MODELS
ON3 ON30 SILVER CITY MODELS DRGW 1872 17 4 WHEEL GONDOLA CAR KIT
ON3 ON30 SILVER CITY MODELS DRGW 1872 14 4 WHEEL GONDOLA CAR KIT
On3 On30 WISEMAN MODELS SM 102 DRGW OPEN PLATFORM COMBINE PASSENGER CAR
Built O On3 Cumbres Depot Structure Kit American Models Laserkit
Sn3 CRAFTSMAN ANVIL MOUNTAIN MODELS RED MOUNTAIN JAIL KIT NEW
Overland Models HO brass AH Gopher Crane on treads unpainted NR
Overland Models HO HOn3 brass AH Log Loader w base unpainted NR