We've searched the internet and found the largest collection of On30 Scale trains for sale is on eBay. Below are the listings for '2-8-0'.

ON3 BALBOA BRASS DRGW C 19 2 8 0 PARTIALLY BUILT RUNS GREAT AND STRONG DETAILED
ON3 BALBOA BRASS DRGW C 19 2 8 0 PARTIALLY BUILT RUNS GREAT AND STRONG DETAILED
$464.95
Time Remaining: 15d 8h 24m
Buy It Now for only: $464.95

Other On30 Scale train items recently purchased through this site:

ON3 BALBOA BRASS DRGW C 19 2 8 0 PARTIALLY BUILT RUNS GREAT AND STRONG DETAILED