I'm not sure if I'll be building a layout anytime soon, but I'm going to buy some rolling stock, if for no other reason than to build kits for the nostalgia factor. Naturally, I don't want to buy anything I won't eventually use, even if I won't use it soon.
Are the older 40' Airslide hoppers still in service? Apparently they were made up into the early 80's, but are they still used 30+ years later, or have they all been replaced with the 50' four-bay units? I ask because I've found the 40's on a very steep sale, and before I buy a case's worth, it might be wise to know if they're still around.