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'.

On30 Heisler Spectrum by Bachmann DCC  Sound diecast metal
On30 Heisler Spectrum by Bachmann DCC Sound diecast metal
$150.00
Time Remaining: 1d 9h 44m
Buy It Now for only: $250.00
Bachmann On30 Greenbrier  Big Run 5 Two Truck Stearns Heisler DCC 28805 MINT
Bachmann On30 Greenbrier Big Run 5 Two Truck Stearns Heisler DCC 28805 MINT
$249.99
Time Remaining: 4d 12h 32m
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
$98.99
Time Remaining: 5d 7h 13m
Buy It Now for only: $98.99
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: 13d 11h 29m
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: 13d 11h 30m
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: 26d 5h 41m
Buy It Now for only: $59.95

Other On30 Scale train items recently purchased through this site:

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