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

Other On30 Scale train items recently purchased through this site:

SUPERB BRIEFCASE MODEL RAILWAY LAYOUT AND TRAIN BY MOUNTAIN LAKE MODELS RAILWAYS
SCRATCH BUILT WOODEN ON30 GAUGE O SCALE COVERED BRIDGE NARROW GAUGE LAYOUT 58