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

Bachmann On30 Scale Train Caboose Off Set Cupola Caboose White Pass Yukon 26564
Bachmann On30 Scale Train Caboose Off Set Cupola Caboose White Pass Yukon 26564
$54.19
Time Remaining: 3d 17m
Buy It Now for only: $54.19
Bachmann On30 Scale Train Caboose Off Set Cupola Durango  Silverton 26565
Bachmann On30 Scale Train Caboose Off Set Cupola Durango Silverton 26565
$54.19
Time Remaining: 3d 17m
Buy It Now for only: $54.19
HON3 Brass Balboa Silver Princess DRGW Long Caboose 0503 C P
HON3 Brass Balboa Silver Princess DRGW Long Caboose 0503 C P
$109.95
Time Remaining: 3d 3h 23m
HON3 Brass Balboa Silver Princess ColoradoSouthern Wheel Caboose C P NEW
HON3 Brass Balboa Silver Princess ColoradoSouthern Wheel Caboose C P NEW
$89.95
Time Remaining: 3d 3h 23m
HOn3 Silver Princess brass DRGW caboose in original box
HOn3 Silver Princess brass DRGW caboose in original box
$85.00
Time Remaining: 28d 6h 26m
Buy It Now for only: $85.00

Other On30 Scale train items recently purchased through this site:

HOn3 Silver Princess brass DRGW caboose in original box
HON3 Brass Balboa Silver Princess ColoradoSouthern Wheel Caboose C P NEW
Bachmann On30 Scale Train Caboose Off Set Cupola Durango Silverton 26565
Bachmann On30 Scale Train Caboose Off Set Cupola Caboose White Pass Yukon 26564
HON3 Brass Balboa Silver Princess DRGW Long Caboose 0503 C P