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

O ON30 SILVER CITY MODELS LOGGING STEAM BOILER FUEL TANK KIT
O ON30 SILVER CITY MODELS LOGGING STEAM BOILER FUEL TANK KIT
$39.95
Time Remaining: 15h 8m
Buy It Now for only: $39.95
Overland Models HO HOn3 brass AH Log Loader w base unpainted NR
Overland Models HO HOn3 brass AH Log Loader w base unpainted NR
$765.00
Time Remaining: 1d 9h 52m
ON30 WISEMAN MODELS WSLC 5 TANK CAR
ON30 WISEMAN MODELS WSLC 5 TANK CAR
$59.99
Time Remaining: 2d 12h 10m
Buy It Now for only: $59.99
Built O On3 Cumbres Depot Structure Kit American Models Laserkit
Built O On3 Cumbres Depot Structure Kit American Models Laserkit
$295.00
Time Remaining: 3d 10h 25m
Buy It Now for only: $295.00
Built O On3 Rio Grande Section House American Models Laserkit
Built O On3 Rio Grande Section House American Models Laserkit
$165.00
Time Remaining: 3d 12h 35m
Buy It Now for only: $165.00
SMOB HO Sawmill Outbuilding Kits 4 HO HOn3 by KMP Models ON SALE ONLY 2 LEFT
SMOB HO Sawmill Outbuilding Kits 4 HO HOn3 by KMP Models ON SALE ONLY 2 LEFT
$72.65
Time Remaining: 11d 10h 50m
Buy It Now for only: $72.65
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: 13d 8h 14m
Buy It Now for only: $25.99
RIO GRANDE MODELS DRGW FLANGER
RIO GRANDE MODELS DRGW FLANGER
$28.00
Time Remaining: 15d 16h 51m
Buy It Now for only: $28.00
HOn3 DRGW 30FT REFRIDGERATOR CAR KIT BY TIMBER CREEK MODELS
HOn3 DRGW 30FT REFRIDGERATOR CAR KIT BY TIMBER CREEK MODELS
$34.00
Time Remaining: 15d 16h 53m
Buy It Now for only: $34.00
RIO GRANDE MODELS DRGW WATER CAR 0470
RIO GRANDE MODELS DRGW WATER CAR 0470
$28.00
Time Remaining: 15d 17h 1m
Buy It Now for only: $28.00
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: 21d 14h 17m
Buy It Now for only: $26.00
ON3 ON30 SILVER CITY MODELS DRGW 1872 12 4 WHEEL BOX CAR KIT
ON3 ON30 SILVER CITY MODELS DRGW 1872 12 4 WHEEL BOX CAR KIT
$36.00
Time Remaining: 21d 14h 17m
Buy It Now for only: $36.00
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: 22d 10h 54m
Buy It Now for only: $89.95
RIO GRANDE MODELS DRGW AIR DUMP GONDOLA
RIO GRANDE MODELS DRGW AIR DUMP GONDOLA
$25.00
Time Remaining: 27d 1h 42m
Buy It Now for only: $25.00

Other On30 Scale train items recently purchased through this site:

O ON30 SILVER CITY MODELS LOGGING STEAM BOILER FUEL TANK KIT
ON30 WISEMAN MODELS WSLC 5 TANK CAR
Built O On3 Cumbres Depot Structure Kit American Models Laserkit
SMOB HO Sawmill Outbuilding Kits 4 HO HOn3 by KMP Models ON SALE ONLY 2 LEFT
RIO GRANDE MODELS DRGW FLANGER
RIO GRANDE MODELS DRGW WATER CAR 0470
HOn3 DRGW 30FT REFRIDGERATOR CAR KIT BY TIMBER CREEK MODELS
RIO GRANDE MODELS DRGW AIR DUMP GONDOLA
ON3 ON30 SILVER CITY MODELS DRGW 1872 17 4 WHEEL GONDOLA CAR KIT
ON3 ON30 SILVER CITY MODELS DRGW 1872 12 4 WHEEL BOX CAR KIT
On3 On30 WISEMAN MODELS SM 102 DRGW OPEN PLATFORM COMBINE PASSENGER CAR
Built O On3 Rio Grande Section House American Models Laserkit
BLACKSMITH SHOP WITH DETAILS HO HON30 HON3 KIT 4010 SEQUOIA MODELS
Overland Models HO HOn3 brass AH Log Loader w base unpainted NR