I'm local to you, in Cheektowaga. There are very few TV guys in our area, maybe 3 or 4 "heavy hitters" including myself. But as we know, CL is replete with buyers from everywhere.
I do have a CRT tester, and can test the picture tube and give it a look over to determine a fair value for the set. But experience tells me that in this area, with a good picture tube, that set would command about $50 at best. Now if we can actually get a picture on the thing.....well, that may be a different story
I actually know the 21K4 chassis decently well, I had one years ago with a beautiful blonde cabinet that worked, but the picture tube was really weak and eventually was only usable in a dark room. Gave the set to a theater company in Springville that was looking for props for a play from the 1950s era.