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'.

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: 4d 14h 8m
Buy It Now for only: $89.95
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: 5d 6h 52m
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
$320.00
Time Remaining: 13d 1h 44m
Buy It Now for only: $320.00
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: 15d 8h 44m
Buy It Now for only: $89.95
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 17h 51m
Buy It Now for only: $69.00
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: 32d 11h 15m
Buy It Now for only: $149.76

Other On30 Scale train items recently purchased through this site:

Bachmann On30 Scale Train Steam Loco 2 6 0 Analog Colorado Mining Company 25262
Bachmann On30 o 4 o Porter WITH SOUND Logging Mining cars
O SCALE On3 On30 WISEMAN MODEL SERVICES LOGGING OR MINING CAMP 4 CABIN SET KIT
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