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 sets'.

BTS S SN3 McCabe Lumber Co Complete Set Of 7 Camp Cars New
BTS S SN3 McCabe Lumber Co Complete Set Of 7 Camp Cars New
$400.00
Time Remaining: 6d 17h 27m
Buy It Now for only: $400.00
ENHANCED Spectrum On30 CS set
ENHANCED Spectrum On30 CS set
$449.00
Time Remaining: 14d 16h 29m
Buy It Now for only: $449.00

Other On30 Scale train items recently purchased through this site:

BTS S SN3 McCabe Lumber Co Complete Set Of 7 Camp Cars New
ENHANCED Spectrum On30 CS set