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 sets'.

TWO CARSON THE SAME SET OF TWO 2 TRUCKS
TWO CARSON THE SAME SET OF TWO 2 TRUCKS
$75.95
Time Remaining: 9h 2m
Buy It Now for only: $98.75
Hawthorne Village Ben Rothlisberger Train Set
Hawthorne Village Ben Rothlisberger Train Set
$200.00
Time Remaining: 23h 35m
Buy It Now for only: $200.00
Logging Camp Cook House  Portable Cabin House Set Scale Model Yorke HOn30 NEW
Logging Camp Cook House Portable Cabin House Set Scale Model Yorke HOn30 NEW
$74.21
Time Remaining: 3d 1h 4m
Buy It Now for only: $74.21
ON30 Bachmann Spectrum Jingle Bell Express Train Set 25012 North pole
ON30 Bachmann Spectrum Jingle Bell Express Train Set 25012 North pole
$279.99
Time Remaining: 3d 2h 37m
Buy It Now for only: $279.99
ON30 Spectrum Roaring Ridge Train Set 25014 Denver  Rio Grande western
ON30 Spectrum Roaring Ridge Train Set 25014 Denver Rio Grande western
$299.99
Time Remaining: 3d 2h 37m
Buy It Now for only: $299.99
Grandt Line 3520 Ophir Delores Depot Detail Set
Grandt Line 3520 Ophir Delores Depot Detail Set
$28.49
Time Remaining: 3d 5h 39m
Buy It Now for only: $28.49
American Flyer No M4239 Cardboard Canister  Lid for No 26782 Trestle Set
American Flyer No M4239 Cardboard Canister Lid for No 26782 Trestle Set
$29.99
Time Remaining: 4d 20h 37m
Buy It Now for only: $29.99
BACHMANN HAWTHORNE VILLAGE SPIRIT OF AMERICA TRAIN SET 11 PC SET
BACHMANN HAWTHORNE VILLAGE SPIRIT OF AMERICA TRAIN SET 11 PC SET
$200.00
Time Remaining: 4d 23h 20m
Buy It Now for only: $200.00
O SCALE On3 On30 WISEMAN MODEL SERVICES LOGGING OR MINING CAMP 4 CABIN SET KIT
O SCALE On3 On30 WISEMAN MODEL SERVICES LOGGING OR MINING CAMP 4 CABIN SET KIT
$89.95
Time Remaining: 5d 1h 32m
Buy It Now for only: $89.95
HAWTHORNE VILLAGE SILVER MOON EXPRESS CARGO CAR AND TRANSFORMER SET
HAWTHORNE VILLAGE SILVER MOON EXPRESS CARGO CAR AND TRANSFORMER SET
$70.00
Time Remaining: 5d 8h 52m
Buy It Now for only: $70.00
HAWTHORNE VILLAGE SPIRIT OF AMERICA EXPRESS COLLECTION TRAIN SET OF 9 ON30 Scale
HAWTHORNE VILLAGE SPIRIT OF AMERICA EXPRESS COLLECTION TRAIN SET OF 9 ON30 Scale
$249.99
Time Remaining: 7d 26m
Buy It Now for only: $249.99
BTS S SN3 McCabe Lumber Co Complete Set Of 7 Camp Cars New
BTS S SN3 McCabe Lumber Co Complete Set Of 7 Camp Cars New
$400.00
Time Remaining: 8d 1h 57m
Buy It Now for only: $400.00
Logging Camp Cook Bunk House Set Thomas Yorke Scale Model Masterpieces On3 NEW
Logging Camp Cook Bunk House Set Thomas Yorke Scale Model Masterpieces On3 NEW
$149.95
Time Remaining: 9d 22h 34m
Buy It Now for only: $149.95
Narrow Gauge Cumbres  Toltec 6 CD PHOTO SET 1300 JPEGS
Narrow Gauge Cumbres Toltec 6 CD PHOTO SET 1300 JPEGS
$29.99
Time Remaining: 11d 1h 43m
Buy It Now for only: $29.99
HAWTHORNE VILLAGE CHRISTMAS COCA COLA LOCOMOTIVE  TENDER TRAIN SET
HAWTHORNE VILLAGE CHRISTMAS COCA COLA LOCOMOTIVE TENDER TRAIN SET
$79.99
Time Remaining: 11d 17h 29m
Buy It Now for only: $79.99
Bachmann On3 NARROW GAUGE EXPRESS TRAIN SET 25005 Great Northern NEW
Bachmann On3 NARROW GAUGE EXPRESS TRAIN SET 25005 Great Northern NEW
$185.00
Time Remaining: 14d 4h 22m
Buy It Now for only: $185.00
Roco H0E 31028 3 Large h0e schmalspur Narrow Gauge Track Set 37 pcs NEW
Roco H0E 31028 3 Large h0e schmalspur Narrow Gauge Track Set 37 pcs NEW
$142.49
Time Remaining: 14d 14h 11m
Buy It Now for only: $142.49
TRAIN SET 4 HAWTHORNE VILLAGE SPIRIT OF AMERICA SET OF 4 NEW COLLECTIBLE
TRAIN SET 4 HAWTHORNE VILLAGE SPIRIT OF AMERICA SET OF 4 NEW COLLECTIBLE
$100.00
Time Remaining: 15d 11h 47m
Buy It Now for only: $100.00
Hawthorne Village Civil War Confederate Express Railroad Track Set
Hawthorne Village Civil War Confederate Express Railroad Track Set
$89.99
Time Remaining: 15d 22h 3m
Buy It Now for only: $89.99
ENHANCED Spectrum On30 CS set
ENHANCED Spectrum On30 CS set
$449.00
Time Remaining: 16d 59m
Buy It Now for only: $449.00
BACHMANN HAWTHORNE VILLAGE SPIRIT OF AMERICA TRAIN SET 13 PC COMPLETE LARGE SET
BACHMANN HAWTHORNE VILLAGE SPIRIT OF AMERICA TRAIN SET 13 PC COMPLETE LARGE SET
$425.95
Time Remaining: 18d 18h 51m
Buy It Now for only: $425.95

Other On30 Scale train items recently purchased through this site:

Bachmann On3 NARROW GAUGE EXPRESS TRAIN SET 25005 Great Northern NEW
ENHANCED Spectrum On30 CS set
Logging Camp Cook Bunk House Set Thomas Yorke Scale Model Masterpieces On3 NEW
BTS S SN3 McCabe Lumber Co Complete Set Of 7 Camp Cars New
Spirit of America Train by Bachmann Hawthorne Village 8 Car Set Excellen
ON30 Spectrum Roaring Ridge Train Set 25014 Denver Rio Grande western
Hawthorne Village Ben Rothlisberger Train Set
TRAIN SET 4 HAWTHORNE VILLAGE SPIRIT OF AMERICA SET OF 4 NEW COLLECTIBLE
On30 Scale Ultimate Railroad Prototype Picture CD Collection Set 25000+ images
HAWTHORNE VILLAGE SPIRIT OF AMERICA EXPRESS COLLECTION TRAIN SET OF 9 ON30 Scale
Hawthorne Village Civil War Confederate Express Railroad Track Set
BACHMANN HAWTHORNE VILLAGE SPIRIT OF AMERICA TRAIN SET 13 PC COMPLETE LARGE SET
O SCALE On3 On30 WISEMAN MODEL SERVICES LOGGING OR MINING CAMP 4 CABIN SET KIT
Narrow Gauge Cumbres Toltec 6 CD PHOTO SET 1300 JPEGS
ON30 Bachmann Spectrum Jingle Bell Express Train Set 25012 North pole
Grandt Line 3520 Ophir Delores Depot Detail Set
American Flyer No M4239 Cardboard Canister Lid for No 26782 Trestle Set
HAWTHORNE VILLAGE SILVER MOON EXPRESS CARGO CAR AND TRANSFORMER SET
Logging Camp Cook House Portable Cabin House Set Scale Model Yorke HOn30 NEW
Roco H0E 31028 3 Large h0e schmalspur Narrow Gauge Track Set 37 pcs NEW
HAWTHORNE VILLAGE CHRISTMAS COCA COLA LOCOMOTIVE TENDER TRAIN SET
TWO CARSON THE SAME SET OF TWO 2 TRUCKS
BACHMANN HAWTHORNE VILLAGE SPIRIT OF AMERICA TRAIN SET 11 PC SET