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 ON30 SCALE SILVER CITY MODELS RESIN STEAM BOILER LOGGING
O ON30 SCALE SILVER CITY MODELS RESIN STEAM BOILER LOGGING
$39.95
Time Remaining: 9d 8h 19m
Buy It Now for only: $39.95
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 11h 15m
Buy It Now for only: $54.95
HOn3 BRASS DRGW UNITED SCALE MODELS TENDER TRUCKS NIB
HOn3 BRASS DRGW UNITED SCALE MODELS TENDER TRUCKS NIB
$32.99
Time Remaining: 12d 20h 51m
Buy It Now for only: $32.99
Campbell Scale Models 357 HO HOn3 Coaling Station Kit
Campbell Scale Models 357 HO HOn3 Coaling Station Kit
$44.99
Time Remaining: 16d 6h 20m
Buy It Now for only: $44.99
Sn3 Rio Grande Models LTD Disconnects 3324 Metal Scale Model Kit
Sn3 Rio Grande Models LTD Disconnects 3324 Metal Scale Model Kit
$49.99
Time Remaining: 16d 21h 22m
Buy It Now for only: $49.99
KMP Models HO Scale Willamette Loader Steam Donkey Craftsman Kit NIB
KMP Models HO Scale Willamette Loader Steam Donkey Craftsman Kit NIB
$72.95
Time Remaining: 23d 22h 24m
Buy It Now for only: $72.95

Other On30 Scale train items recently purchased through this site:

O ON30 SCALE SILVER CITY MODELS RESIN STEAM BOILER LOGGING
Campbell Scale Models 357 HO HOn3 Coaling Station Kit
KMP Models HO Scale Willamette Loader Steam Donkey Craftsman Kit NIB
HOn3 BRASS DRGW UNITED SCALE MODELS TENDER TRUCKS NIB
O SCALE On3 On30 1 48 WISEMAN MODELS OKT 22 KLEIBER OPEN CAB FLAT BED TRUCK KIT
Sn3 Rio Grande Models LTD Disconnects 3324 Metal Scale Model Kit