Remember that there were only three Chessie 40 foot boxcars. Most of the 40 foot boxcars did not get repainted. So, to be accurate, you only need one Chessie car, and some of each of the predecessor road paint jobs. You should pay between $6-7 for one. I am uncertain as to how many road numbers and how many predecessor paint jobs are out there, but I did two in B&O predecessor paint, since they were a close match. I know there is a decorated one for the WM available that would make a handsome addition right out of the box.
Below is a Dean Heacock pic of one of the three
40ft boxcars
in Chessie blue, Chessie C&O #23757.
Below is my repainted Athearn 40ft boxcar,
Chessie C&O
#19335. It is basically 80% correct out of the box.
The flaws
are too minor to worry about fixing. I didn't do any
cutting or sanding
on this kit. I just stripped off the old paint and
repainted it.