You gotta look deeply in hobby shops if you in the bay area, check surrounding hobby shops, i check loose caboose Napa,Ca they have a 3pack of the cars that they recently got in. The cars are extremely beautiful, although T-man is right, at the club when we run a session somehow im always running late from stations, so how my sound turns off for not apparent reason, it make me frustrated but its that love/hate relationship thing that you have to work with.
Here is where to find the engine and the cars I buy from these guys so they are ok:
http://www.internettrains.com/merchant2/merchant.mvc?Screen=PROD&Store_Code=IT&Product_Code=ATH-26307
and here is the 3pack for the cars:
http://www.horizonhobby.com/Products/Default.aspx?ProdId=ATH25909&utm_source=froogle
Here is a video of my caltrain, going around the track and getting into some trouble lol.
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ps. Thanks T-man for referring me over to here! Glad to help out