Boy, talk about thread drift - and longevity! lol. Lots of great discussion and info, though.
I'm in Reggie Day's camp pack on page 2 or 3 almost a year ago...200-series (County) cars. I can see the need and volume for grills and diners, but a couple point should be made, despite the sales levels for the brass sides raised earlier - and it's hard to challenge good data!
If you're running a consist with an FL-9 pr EP-5 you need these cars- even if one per train - how many FL-9's did you buy and how many EP-5s? Right...
If you're not running and FL-9 or EP-5 you need these cars. Why? because you can get the version with the really cool telephone antenna on the roof!
You really do need "more than one": of these cars no matter what era or motive power you model. Remember, a bunch of these cars were reconfigured and the baggage section eliminated...Oh! nope. no one has mentioned that one yet...so, a County is not a County is not a County....
Reggie already mentioned there were survivors into other railroads.
Lastly on the sales volume of brass sides; that was a while ago - there were no FL-9s or EP-5s other than brass, so possibly a smaller market than today. Also a more edumacated. larger market today,
Meat wagons may come first, but I think the County cars should not be counted out.