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

Ride the Sandy River Americas Largest Two foot Railroad Narrow Gauge
Ride the Sandy River Americas Largest Two foot Railroad Narrow Gauge
$47.02
Time Remaining: 4h 43m
Buy It Now for only: $47.02
Handcars Railcars Railbuses of the SRRL Sandy River Rangeley Railway
Handcars Railcars Railbuses of the SRRL Sandy River Rangeley Railway
$28.93
Time Remaining: 29d 22h 10m
Buy It Now for only: $28.93

Other On30 Scale train items recently purchased through this site:

Ride the Sandy River Americas Largest Two foot Railroad Narrow Gauge
Handcars Railcars Railbuses of the SRRL Sandy River Rangeley Railway