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

O SCALE On3 On30 1 48 WISEMAN MODELS OKT 22 KLEIBER OPEN CAB FLAT BED TRUCK KIT
O SCALE On3 On30 1 48 WISEMAN MODELS OKT 22 KLEIBER OPEN CAB FLAT BED TRUCK KIT
$54.95
Time Remaining: 10d 2h 44m
Buy It Now for only: $54.95
O ON30 SCALE SILVER CITY MODELS RESIN STEAM BOILER LOGGING
O ON30 SCALE SILVER CITY MODELS RESIN STEAM BOILER LOGGING
$39.95
Time Remaining: 23d 19h 21m
Buy It Now for only: $39.95

Other On30 Scale train items recently purchased through this site:

O ON30 SCALE SILVER CITY MODELS RESIN STEAM BOILER LOGGING
O SCALE On3 On30 1 48 WISEMAN MODELS OKT 22 KLEIBER OPEN CAB FLAT BED TRUCK KIT