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

Bachmann On30 Greenbrier  Big Run 5 Two Truck Stearns Heisler DCC 28805
Bachmann On30 Greenbrier Big Run 5 Two Truck Stearns Heisler DCC 28805
$278.99
Time Remaining: 14d 3h 43m
Buy It Now for only: $278.99
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 44m
Buy It Now for only: $278.99
On30 WISEMAN MODEL SERVICES VT SHOPS AHM HEISLER CONVERSION KIT
On30 WISEMAN MODEL SERVICES VT SHOPS AHM HEISLER CONVERSION KIT
$59.95
Time Remaining: 21d 9h 36m
Buy It Now for only: $59.95
Bachmann 44953 On30 14 Ton Stearns Heisler Companion Plug and Play Sound Module
Bachmann 44953 On30 14 Ton Stearns Heisler Companion Plug and Play Sound Module
$102.89
Time Remaining: 24d 1h 47m
Buy It Now for only: $102.89

Other On30 Scale train items recently purchased through this site:

On30 WISEMAN MODEL SERVICES VT SHOPS AHM HEISLER CONVERSION KIT
Bachmann On30 Greenbrier Big Run 5 Two Truck Stearns Heisler DCC 28805
Bachmann On30 Midwest Quarry Mining Co 4 Two Truck Stearns Heisler DCC 28806
Bachmann 44953 On30 14 Ton Stearns Heisler Companion Plug and Play Sound Module