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 trains scale'.

Gramps UTLX tank car narrow gauge weathered Blackstone Models HOn3 scale
Gramps UTLX tank car narrow gauge weathered Blackstone Models HOn3 scale
$48.00
Time Remaining: 9h 38m
VINTAGE QUALITY CRAFT MODELS HAYDENTON COVERED DEPOT KIT 103 HO SCALE
VINTAGE QUALITY CRAFT MODELS HAYDENTON COVERED DEPOT KIT 103 HO SCALE
$33.95
Time Remaining: 1d 11h 37m
Buy It Now for only: $44.50
HOn3 10 CS CABOOSE 4 WHELL BRASS SLIM PRINCESS BY BALBOA SCALE MODELS
HOn3 10 CS CABOOSE 4 WHELL BRASS SLIM PRINCESS BY BALBOA SCALE MODELS
$90.00
Time Remaining: 6d 11h 43m
Buy It Now for only: $90.00

Other On30 Scale train items recently purchased through this site:

HOn3 10 CS CABOOSE 4 WHELL BRASS SLIM PRINCESS BY BALBOA SCALE MODELS
Gramps UTLX tank car narrow gauge weathered Blackstone Models HOn3 scale
VINTAGE QUALITY CRAFT MODELS HAYDENTON COVERED DEPOT KIT 103