DOES THE PRUSSIA RUN BY THE ENGINE OR BY A TENDER AS THE BULL OR DEWITT ? LOOKING FOR A TENDER IF RUN BY THE TENDER.
Here is the whole train set for $55 + $5 shipping.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=290414429510&hlp=false&rvr_id=151383175424&crlp=1_263602_304652&UA=%3F*F%3F&GUID=58086a1c1260a0e205868e16ffc3c247&itemid=290414429510&ff4=263602_304652 (http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=290414429510&hlp=false&rvr_id=151383175424&crlp=1_263602_304652&UA=%3F*F%3F&GUID=58086a1c1260a0e205868e16ffc3c247&itemid=290414429510&ff4=263602_304652)
and the set including track and power pack for $65
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=200491461983&hlp=false&rvr_id=151443217658&crlp=1_263602_304652&UA=%3F*F%3F&GUID=58086a1c1260a0e205868e16ffc3c247&itemid=200491461983&ff4=263602_304652 (http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=200491461983&hlp=false&rvr_id=151443217658&crlp=1_263602_304652&UA=%3F*F%3F&GUID=58086a1c1260a0e205868e16ffc3c247&itemid=200491461983&ff4=263602_304652)
Here is the parts diagram, courtesy of Ray Marinaccio:
(http://www.hoseeker.net/assemblyexplosionbachmann/bachmann420prussiapg2.jpg)
Right click with your mouse over the image and click "view image" and then a page with the image will open where you can zoom in a bit.