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

HO S O HAND MOTOR TOOL WITH ASSORTED TOOLS AND STUFF
HO S O HAND MOTOR TOOL WITH ASSORTED TOOLS AND STUFF
$39.95
Time Remaining: 11d 20h 7m
Buy It Now for only: $39.95

Other On30 Scale train items recently purchased through this site:

HO S O HAND MOTOR TOOL WITH ASSORTED TOOLS AND STUFF