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'.

Craftsman Wood Built Gravel Stone Quarry Mine w lights from HOn3 layout VGC
Craftsman Wood Built Gravel Stone Quarry Mine w lights from HOn3 layout VGC
$32.51 (5 Bids)
Time Remaining: 13h 44m
Craftsman Wood Built Coal Ore Mine with lights from HOn3 layout VGC
Craftsman Wood Built Coal Ore Mine with lights from HOn3 layout VGC
$36.00 (7 Bids)
Time Remaining: 17h 7m
Craftsman Wood Built Mine Structure with lights from HOn3 layout VGC
Craftsman Wood Built Mine Structure with lights from HOn3 layout VGC
$36.00 (6 Bids)
Time Remaining: 17h 22m
Bachmann On30 Scale Train Steam Loco 2 6 0 Analog Colorado Mining Company 25262
Bachmann On30 Scale Train Steam Loco 2 6 0 Analog Colorado Mining Company 25262
$149.76
Time Remaining: 1d 15h 54m
Buy It Now for only: $149.76
MASTER CREATIONS FRED C DOBBS MINING SUPPLY CO KIT40
MASTER CREATIONS FRED C DOBBS MINING SUPPLY CO KIT40
$125.00
Time Remaining: 2d 20h 34m
S Sn3 CRAFTSMAN BUILDING  STRUCTURE  COEUR d ALENE MINE KIT  UNSTARTED
S Sn3 CRAFTSMAN BUILDING STRUCTURE COEUR d ALENE MINE KIT UNSTARTED
$89.95
Time Remaining: 6d 18h 47m
Buy It Now for only: $89.95
On30 Bachmann Logging and Mining Cars 3 pcs
On30 Bachmann Logging and Mining Cars 3 pcs
$89.99
Time Remaining: 7d 10h 52m
Buy It Now for only: $89.99
On30 Bachmann Logging  Mining Car Wood Sided Dmp Car 3 pcs
On30 Bachmann Logging Mining Car Wood Sided Dmp Car 3 pcs
$74.99
Time Remaining: 7d 11h 31m
Buy It Now for only: $74.99
Bachmann On30 o 4 o Porter WITH SOUND  Logging Mining cars
Bachmann On30 o 4 o Porter WITH SOUND Logging Mining cars
$325.00
Time Remaining: 9d 14h 11m
Buy It Now for only: $325.00
On30HO Side Dump Wagons Mining car Ore Erz Car x 3pcs 3 Stck set per box
On30HO Side Dump Wagons Mining car Ore Erz Car x 3pcs 3 Stck set per box
$69.00
Time Remaining: 16d 22h 29m
Buy It Now for only: $69.00
Bachmann On30 Scale Train Stearns Heisler DCC Equipped Colorado Mining Co 28801
Bachmann On30 Scale Train Stearns Heisler DCC Equipped Colorado Mining Co 28801
$187.07
Time Remaining: 18d 19h 27m
Buy It Now for only: $187.07
Bachmann On30 Scale Train Mining Wood Side Dump Cars 3 per box 29801
Bachmann On30 Scale Train Mining Wood Side Dump Cars 3 per box 29801
$69.44
Time Remaining: 18d 19h 27m
Buy It Now for only: $69.44
Bachmann On30 Scale Train Logging  Mining Cars V Dump Cars 3 per box 29802
Bachmann On30 Scale Train Logging Mining Cars V Dump Cars 3 per box 29802
$66.27
Time Remaining: 18d 19h 27m
Buy It Now for only: $66.27
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: 20d 20h 30m
Buy It Now for only: $124.95
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: 28d 13h 23m
Buy It Now for only: $89.95
Bachmann Spectrum On30 Rail Truck 29133 Colorado Mining Co NIP DCC on board
Bachmann Spectrum On30 Rail Truck 29133 Colorado Mining Co NIP DCC on board
$159.95
Time Remaining: 28d 20h 47m
Buy It Now for only: $159.95
Bachmann On30 Scale Train Mining Wood Side Dump Cars 3 per box 29801
Bachmann On30 Scale Train Mining Wood Side Dump Cars 3 per box 29801
$70.00
Time Remaining: 28d 21h 36m
Buy It Now for only: $70.00

Other On30 Scale train items recently purchased through this site:

Craftsman Wood Built Coal Ore Mine with lights from HOn3 layout VGC
MASTER CREATIONS FRED C DOBBS MINING SUPPLY CO KIT40
Craftsman Wood Built Mine Structure with lights from HOn3 layout VGC
Craftsman Wood Built Gravel Stone Quarry Mine w lights from HOn3 layout VGC
Bachmann On30 Scale Train Mining Wood Side Dump Cars 3 per box 29801
Bachmann On30 Scale Train Steam Loco 2 6 0 Analog Colorado Mining Company 25262
Bachmann On30 Scale Train Logging Mining Cars V Dump Cars 3 per box 29802
Bachmann Spectrum On30 Rail Truck 29133 Colorado Mining Co NIP DCC on board
Bachmann On30 o 4 o Porter WITH SOUND Logging Mining cars
Bachmann On30 Scale Train Mining Wood Side Dump Cars 3 per box 29801
Bachmann On30 Scale Train Stearns Heisler DCC Equipped Colorado Mining Co 28801
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
On30HO Side Dump Wagons Mining car Ore Erz Car x 3pcs 3 Stck set per box
S Sn3 CRAFTSMAN BUILDING STRUCTURE COEUR d ALENE MINE KIT UNSTARTED
On30 Bachmann Logging Mining Car Wood Sided Dmp Car 3 pcs
On30 Bachmann Logging and Mining Cars 3 pcs