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

ON30 AMS Tank Car Shell SCCX A 09
ON30 AMS Tank Car Shell SCCX A 09
$45.00
Time Remaining: 15d 7h 38m
Buy It Now for only: $45.00
ON30 AMS Tank Car Standard Oil 106
ON30 AMS Tank Car Standard Oil 106
$45.00
Time Remaining: 17d 10h 46m
Buy It Now for only: $45.00
ON30 AMS Flat Car Nevada County Narrow Guage NCNG 433
ON30 AMS Flat Car Nevada County Narrow Guage NCNG 433
$45.00
Time Remaining: 17d 11h 25m
Buy It Now for only: $45.00
ON30 AMS Flat Car Nevada County Narrow Guage NCNG 401
ON30 AMS Flat Car Nevada County Narrow Guage NCNG 401
$45.00
Time Remaining: 17d 11h 26m
Buy It Now for only: $45.00

Other On30 Scale train items recently purchased through this site:

ON30 AMS Tank Car Shell SCCX A 09
ON30 AMS Tank Car Standard Oil 106
ON30 AMS Flat Car Nevada County Narrow Guage NCNG 433
ON30 AMS Flat Car Nevada County Narrow Guage NCNG 401