@Mark Boyce - Thanks for the compliment Mark. I agree that left to my own devices, I might call the car olive or khaki but I used the word that Lionel used (at least as quoted in my reference material) and that was TEAL. Colors can be difficult for sure especially after so many years and a photograph in a book is not a perfect reference. Anyway thank you for the comment.
@Bill Swatos- In the O-27 boxcar world even in PW you have the common and the rare. The most common are those that lionel put in their regular line like the orange Baby Ruth or the Bosco cars (red, white, orange) which are normally inexpensive. On the other hand I looked for years for the Chung King foods boxcar which (like the Townhouse car) was only packed in one promotional set in 1956, the X-150, which was uncatalogued. So you have to look hard for those. For regular PW rolling stock, the hoppers , gondolas, and flats seem to be the most available. SOME of the early boxcars (6454 etc) and even some of the famous 6464 cars are relatively available (and modest in price) but the 6464 series is replete with very rare variations that go for very high sums. Cabooses, since one came with every freight train in a set are a fun and relatively modest cost to collect and they have some neat variations both in livery and basic design (SP cupola style, Work, Bay-window etc.) If I am giving you old news or stuff you fully know, sorry sometimes I just mentally run off !
Best Wishes
Don