Just like BDC says, the ONLY advice when buying Bachmann is see it running before you part with money. When you get a good one you've really got a good one. Buy mail order and there's no telling what it will run like (if at all).
I'm happy with all my Bachmann stuff coz I bought them all from hobby stores. A little lube and running-in is usually all that's needed on the good ones.
Bachman is great value for money, and their quality is improving all the time.
By the way it, it helps when we know what gauge you are thinking of buying items for
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Errol