I think just about every type of vintage TV is comparatively plentiful in NY, which was basically the birthplace of US television manufacturing (and use). Here in the Pacific Northwest, it would be unusual to find anything by Stromberg Carlson.
Scarcity doesn't automatically equate to high value, of course. As a rule, serious TV collectors tend to be more interested in the earlier TVs with smaller picture tubes -- especially (and these are truly rare) any pre-WWII sets. That said, Stromberg Carlson was known for building quality sets and I imagine that one would perform well after you gave it the usual electronic overhaul (which all old TVs require).
Phil Nelson
Phil's Old Radios
http://antiqueradio.org/index.html