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 railway'.

SUPERB BRIEFCASE MODEL RAILWAY LAYOUT AND TRAIN BY MOUNTAIN LAKE MODELS RAILWAYS
SUPERB BRIEFCASE MODEL RAILWAY LAYOUT AND TRAIN BY MOUNTAIN LAKE MODELS RAILWAYS
$1,751.06
Time Remaining: 6d 7h 2m
Buy It Now for only: $1,751.06
Dundas Models DM56 Festiniog Railway Granite End Door Wagon Pack of 5 T48
Dundas Models DM56 Festiniog Railway Granite End Door Wagon Pack of 5 T48
$38.42
Time Remaining: 8d 18h 17m
Buy It Now for only: $38.42
Dundas Models DM25 Festiniog Railway 2 Ton Steel Sided Slate Wagon 5 Pack T48
Dundas Models DM25 Festiniog Railway 2 Ton Steel Sided Slate Wagon 5 Pack T48
$36.28
Time Remaining: 8d 18h 18m
Buy It Now for only: $36.28
86 HOWE TRUSS DECK BRIDGE S On30 Model Railroad Structure Craftsman Kit HL109S
86 HOWE TRUSS DECK BRIDGE S On30 Model Railroad Structure Craftsman Kit HL109S
$179.95
Time Remaining: 8d 21h 25m
Buy It Now for only: $179.95
On30 Model Railroad Building Built  Painted On30 Narrow Gauge Blacksmith Shop
On30 Model Railroad Building Built Painted On30 Narrow Gauge Blacksmith Shop
$94.00
Time Remaining: 12d 11h
Buy It Now for only: $94.00
On30 Model Railroad Hotel Built Finished Lighted Narrow Gauge Model Railroad Bld
On30 Model Railroad Hotel Built Finished Lighted Narrow Gauge Model Railroad Bld
$120.00
Time Remaining: 12d 11h 1m
Buy It Now for only: $120.00
On30 Stone Model Railroad Building BUILT Millwork Included Narrow Gauge Railroa
On30 Stone Model Railroad Building BUILT Millwork Included Narrow Gauge Railroa
$60.00
Time Remaining: 12d 11h 2m
Buy It Now for only: $60.00
O Scale On30 Scale Model Railroad Depot Narrow Gauge Backwoods Passenger Freight
O Scale On30 Scale Model Railroad Depot Narrow Gauge Backwoods Passenger Freight
$128.00
Time Remaining: 12d 11h 21m
Buy It Now for only: $128.00
O On30 24 WATERLINE LOGS Model Railroad Scenery Unpainted Resin Details FR1665
O On30 24 WATERLINE LOGS Model Railroad Scenery Unpainted Resin Details FR1665
$26.95
Time Remaining: 19d 50m
Buy It Now for only: $26.95
16 LOG BRONC O On30 Model Railroad Waterline Hull Unpainted Cast Resin Kit FR65
16 LOG BRONC O On30 Model Railroad Waterline Hull Unpainted Cast Resin Kit FR65
$29.95
Time Remaining: 20d 13h 56m
Buy It Now for only: $29.95
170 HOWE TRUSS DECK BRIDGE S On30 Model Railroad Structure Unpainted Kit HL110S
170 HOWE TRUSS DECK BRIDGE S On30 Model Railroad Structure Unpainted Kit HL110S
$294.95
Time Remaining: 20d 14h 5m
Buy It Now for only: $294.95

Other On30 Scale train items recently purchased through this site:

SUPERB BRIEFCASE MODEL RAILWAY LAYOUT AND TRAIN BY MOUNTAIN LAKE MODELS RAILWAYS
O On30 24 WATERLINE LOGS Model Railroad Scenery Unpainted Resin Details FR1665
16 LOG BRONC O On30 Model Railroad Waterline Hull Unpainted Cast Resin Kit FR65
On30 Model Railroad Building Built Painted On30 Narrow Gauge Blacksmith Shop
On30 Model Railroad Hotel Built Finished Lighted Narrow Gauge Model Railroad Bld
170 HOWE TRUSS DECK BRIDGE S On30 Model Railroad Structure Unpainted Kit HL110S
86 HOWE TRUSS DECK BRIDGE S On30 Model Railroad Structure Craftsman Kit HL109S
O Scale On30 Scale Model Railroad Depot Narrow Gauge Backwoods Passenger Freight
On30 Stone Model Railroad Building BUILT Millwork Included Narrow Gauge Railroa
Dundas Models DM25 Festiniog Railway 2 Ton Steel Sided Slate Wagon 5 Pack T48
Dundas Models DM56 Festiniog Railway Granite End Door Wagon Pack of 5 T48