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

On30 Logging Steam Locomotive Switcher TSU DCC  Sound custom weathered
On30 Logging Steam Locomotive Switcher TSU DCC Sound custom weathered
$345.00
Time Remaining: 20h 43m
BLACKSTONE MODELS HOn3 B370112 Switcher Pilot Assembly for Blackstone K 27
BLACKSTONE MODELS HOn3 B370112 Switcher Pilot Assembly for Blackstone K 27
$26.99
Time Remaining: 3d 12h 30m
Buy It Now for only: $26.99

Other On30 Scale train items recently purchased through this site:

On30 Logging Steam Locomotive Switcher TSU DCC Sound custom weathered
BLACKSTONE MODELS HOn3 B370112 Switcher Pilot Assembly for Blackstone K 27