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

Bachmann Spectrum On30 27146 Freight Tank Car Zerolene NEW
Bachmann Spectrum On30 27146 Freight Tank Car Zerolene NEW
$42.99
Time Remaining: 1d 20h
Buy It Now for only: $57.99
Bachmann On30 Coca Cola Tank Car Limited Ed
Bachmann On30 Coca Cola Tank Car Limited Ed
$39.99
Time Remaining: 2d 11h 51m
Buy It Now for only: $39.99
ON30 WISEMAN MODELS WSLC 5 TANK CAR
ON30 WISEMAN MODELS WSLC 5 TANK CAR
$59.99
Time Remaining: 4d 13h 19m
Buy It Now for only: $59.99
Bachmann On30 Scale Train Tank Car Tank Car DS Fire Suppression 27122
Bachmann On30 Scale Train Tank Car Tank Car DS Fire Suppression 27122
$32.74
Time Remaining: 14d 9h 45m
Buy It Now for only: $32.74
On3 On30 WISEMAN MODEL SERVICES WEST SIDE LUMBER CO OIL TANK CAR 5 KIT
On3 On30 WISEMAN MODEL SERVICES WEST SIDE LUMBER CO OIL TANK CAR 5 KIT
$89.95
Time Remaining: 23d 15h 24m
Buy It Now for only: $89.95

Other On30 Scale train items recently purchased through this site:

On3 On30 WISEMAN MODEL SERVICES WEST SIDE LUMBER CO OIL TANK CAR 5 KIT
ON30 WISEMAN MODELS WSLC 5 TANK CAR
Bachmann On30 Scale Train Tank Car Tank Car DS Fire Suppression 27122
Bachmann Spectrum On30 27146 Freight Tank Car Zerolene NEW
Bachmann On30 Coca Cola Tank Car Limited Ed