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

HO HO HO HOLIDAY GONDOLA CAR HAWTHORNE RUDOLPHS CHRISTMAS TOWN EXPRESS NIB
HO HO HO HOLIDAY GONDOLA CAR HAWTHORNE RUDOLPHS CHRISTMAS TOWN EXPRESS NIB
$74.99
Time Remaining: 23d 8h 19m
Buy It Now for only: $74.99
Bachmann On30 Scale Train Set Analog Norman RockwellS American Christmas 25023
Bachmann On30 Scale Train Set Analog Norman RockwellS American Christmas 25023
$276.45
Time Remaining: 32d 11h 11m
Buy It Now for only: $276.45

Other On30 Scale train items recently purchased through this site:

Bachmann On30 Scale Train Set Analog Norman RockwellS American Christmas 25023
HO HO HO HOLIDAY GONDOLA CAR HAWTHORNE RUDOLPHS CHRISTMAS TOWN EXPRESS NIB