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 B370101 Snowplow Assembly for Blackstone K 27
BLACKSTONE MODELS HOn3 B370101 Snowplow Assembly for Blackstone K 27
$26.99
Time Remaining: 3d 12h 3m
Buy It Now for only: $26.99
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: 3d 12h 11m
Buy It Now for only: $26.99
BLACKSTONE MODELS HOn3 B370112 Switcher Pilot Assembly for Blackstone K 27
BLACKSTONE MODELS HOn3 B370112 Switcher Pilot Assembly for Blackstone K 27
$26.99
Time Remaining: 3d 12h 15m
Buy It Now for only: $26.99
HOn3 Brass Locomotive K27
HOn3 Brass Locomotive K27
$200.00
Time Remaining: 6d 22h 7m

Other On30 Scale train items recently purchased through this site:

HOn3 Brass Locomotive K27
BLACKSTONE MODELS HOn3 B370101 Snowplow Assembly for Blackstone K 27
BLACKSTONE MODELS HOn3 B370111 Road Pilot Assembly for Blackstone K 27
BLACKSTONE MODELS HOn3 B370112 Switcher Pilot Assembly for Blackstone K 27