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

O SCALE On3 On30 WISEMAN MODEL SERVICES LOGGING OR MINING CAMP 4 CABIN SET KIT
O SCALE On3 On30 WISEMAN MODEL SERVICES LOGGING OR MINING CAMP 4 CABIN SET KIT
$89.95
Time Remaining: 2d 2h 43m
Buy It Now for only: $89.95
Bachmann Spectrum 27861 NEW On30 Highside Gondola Car Midwest Quarry
Bachmann Spectrum 27861 NEW On30 Highside Gondola Car Midwest Quarry
$56.00
Time Remaining: 3d 6h 12m
Buy It Now for only: $95.00
Bachmann 29162 On30 Colorado Mining Co Rail Truck w DCC
Bachmann 29162 On30 Colorado Mining Co Rail Truck w DCC
$125.00
Time Remaining: 10d 3h 59m
Buy It Now for only: $125.00
Bachmann On30 Midwest Quarry  Mining Co 4 Two Truck Stearns Heisler DCC 28806
Bachmann On30 Midwest Quarry Mining Co 4 Two Truck Stearns Heisler DCC 28806
$278.99
Time Remaining: 14d 3h 45m
Buy It Now for only: $278.99
Bachmann Spectrum On30 Scale Rail Truck Colorado Mining Co DCC
Bachmann Spectrum On30 Scale Rail Truck Colorado Mining Co DCC
$95.40
Time Remaining: 14d 8h 13m
Buy It Now for only: $95.40
Bachmann Spectrum On30 Scale Rail Truck Midwest Quarry  Mining Co DCC
Bachmann Spectrum On30 Scale Rail Truck Midwest Quarry Mining Co DCC
$95.40
Time Remaining: 14d 8h 17m
Buy It Now for only: $95.40
Bachmann Spectrum On30 Scale Rail Truck Colorado Mining Co DCC NEW IN BOX
Bachmann Spectrum On30 Scale Rail Truck Colorado Mining Co DCC NEW IN BOX
$155.00
Time Remaining: 19d 22h 38m
Buy It Now for only: $155.00
O SCALE WISEMAN MODEL SERVICES GRAND CENTRAL GOLD MINE INTERIOR KIT On3 On30
O SCALE WISEMAN MODEL SERVICES GRAND CENTRAL GOLD MINE INTERIOR KIT On3 On30
$124.95
Time Remaining: 24d 9h 51m
Buy It Now for only: $124.95

Other On30 Scale train items recently purchased through this site:

Bachmann Spectrum On30 Scale Rail Truck Colorado Mining Co DCC
Bachmann 29162 On30 Colorado Mining Co Rail Truck w DCC
Bachmann Spectrum 27861 NEW On30 Highside Gondola Car Midwest Quarry
O SCALE On3 On30 WISEMAN MODEL SERVICES LOGGING OR MINING CAMP 4 CABIN SET KIT
O SCALE WISEMAN MODEL SERVICES GRAND CENTRAL GOLD MINE INTERIOR KIT On3 On30
Bachmann Spectrum On30 Scale Rail Truck Midwest Quarry Mining Co DCC
Bachmann Spectrum On30 Scale Rail Truck Colorado Mining Co DCC NEW IN BOX
Bachmann On30 Midwest Quarry Mining Co 4 Two Truck Stearns Heisler DCC 28806