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

Bachmann Spectrum 28299 On30 0 4 2 Porter Stem Loco DCC Train
Bachmann Spectrum 28299 On30 0 4 2 Porter Stem Loco DCC Train
$103.50
Time Remaining: 1d 1h 42m
Buy It Now for only: $103.50
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: 14d 6h 26m
Buy It Now for only: $320.00

Other On30 Scale train items recently purchased through this site:

Bachmann On30 o 4 o Porter WITH SOUND Logging Mining cars
Bachmann Spectrum 28299 On30 0 4 2 Porter Stem Loco DCC Train