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

On3 On30 CRAFTSMAN SAN JUAN ENGINEERING DRGW 2 STALL ENGINE HOUSE KIT UNSTARTED
On3 On30 CRAFTSMAN SAN JUAN ENGINEERING DRGW 2 STALL ENGINE HOUSE KIT UNSTARTED
$149.95
Time Remaining: 27d 20h 59m
Buy It Now for only: $149.95

Other On30 Scale train items recently purchased through this site:

On3 On30 CRAFTSMAN SAN JUAN ENGINEERING DRGW 2 STALL ENGINE HOUSE KIT UNSTARTED