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 Steam Porter 0 4 2 with DCC Painted Narrow Gauge On30
Bachmann Spectrum Steam Porter 0 4 2 with DCC Painted Narrow Gauge On30
$99.95
Time Remaining: 1d 9h 30m
NEW SPECTRUM 25561 ON30 0 4 2 PORTER STEAM MIDWEST QUARRY  FREE SHIPPING
NEW SPECTRUM 25561 ON30 0 4 2 PORTER STEAM MIDWEST QUARRY FREE SHIPPING
$75.00
Time Remaining: 17d 5h
Buy It Now for only: $75.00
NEW SPECTRUM 25314 ON30 0 4 0 PORTER STEAM PENNSYLVANIA FREE SHIPPING
NEW SPECTRUM 25314 ON30 0 4 0 PORTER STEAM PENNSYLVANIA FREE SHIPPING
$75.00
Time Remaining: 17d 7h 33m
Buy It Now for only: $75.00

Other On30 Scale train items recently purchased through this site:

Bachmann Spectrum Steam Porter 0 4 2 with DCC Painted Narrow Gauge On30
NEW SPECTRUM 25314 ON30 0 4 0 PORTER STEAM PENNSYLVANIA FREE SHIPPING
NEW SPECTRUM 25561 ON30 0 4 2 PORTER STEAM MIDWEST QUARRY FREE SHIPPING