Be forewarned, for whatever reason unexplained, if you go to the Bachmann website for Williams parts, and look under the scale 44 ton switcher, it has already been DISCONTINUED.
https://estore.bachmanntrains....k2o0i7hlevhknafkl0k7
I think this explains the blowout pricing from some dealers on these. So if you want one, you 'd better buy two of them: One to keep on hand for parts, since most of the parts for these (the ones that were available) are already gone.
Bear in mind, these did not have a long production run, so there's not going to be lots of them around on the secondary market like other models from other companies with discontinued engines that had larger and longer production runs... or used common universal parts.
And I have no idea whether the motor with the gear used in this 44 ton switcher might be the same motor and gear being used in their new 70 ton switcher. That would be helpful if some of the parts on these were compatible, but WBB doesn't have parts listed yet for the 70 ton switcher.
Note: The motor number for the scale 44 ton engine is #50016, which is the same motor used in the NW2 according to the universal parts listings. But it is currently out of stock. In case anyone needs it, here's the parts breakdown for the scale 44 ton engine.
https://www.bachmanntrains.com...WITCHERPartsList.pdf