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'.

HO HOn3 SIERRAWEST SCALE MODELS 204 RAILROAD CAMP CRAFTSMAN STRUCTURE KIT
HO HOn3 SIERRAWEST SCALE MODELS 204 RAILROAD CAMP CRAFTSMAN STRUCTURE KIT
$249.95
Time Remaining: 3d 16h 6m
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: 12d 19h 46m
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: 26d 4h 37m
Buy It Now for only: $39.95
HO HOn3 SIERRAWEST SCALE MODELS 208 LOCO AND SERVICE SHOPS CRAFTSMAN KIT
HO HOn3 SIERRAWEST SCALE MODELS 208 LOCO AND SERVICE SHOPS CRAFTSMAN KIT
$329.95
Time Remaining: 26d 18h 25m
Buy It Now for only: $329.95

Other On30 Scale train items recently purchased through this site:

HO HOn3 SIERRAWEST SCALE MODELS 204 RAILROAD CAMP CRAFTSMAN STRUCTURE KIT
HO HOn3 SIERRAWEST SCALE MODELS 208 LOCO AND SERVICE SHOPS CRAFTSMAN KIT
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