We've searched the internet and found the largest collection of On30 Scale trains for sale is on eBay. Below are the listings for 'K-27'.

BLACKSTONE MODELS HOn3 B370111 Road Pilot Assembly for Blackstone K 27
BLACKSTONE MODELS HOn3 B370111 Road Pilot Assembly for Blackstone K 27
$26.99
Time Remaining: 4d 8h
Buy It Now for only: $26.99

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BLACKSTONE MODELS HOn3 B370111 Road Pilot Assembly for Blackstone K 27