I offer to customers to return the old and replaced parts. Some customers don't want them. So I store them and will give them to people for no charge other than shipping. Just contact me with what you need. We may need to interact a few times to nail down exactly what you are looking for.
Please no window shoppers - you must have a need for an exact part.
There are lots of steam locomotive gear boxes and motor mounts. There are no U.S.Hobbies gearboxes, can motors, and driver wheelsets (I have some new). There are a few open frame motors. There are some hard to find universal sets for Max Gray and U.S.Hobbies articulated locos. Other parts that don't come to mind too. Just contact me.