To answer your question, the metal you are speaking of is stainless, and the little bit that is there is hardly worth the problems of breaking open the CRT tube.
According to the EPA, if a CRT tube is left intact, it is considered a "commodity", BUT the moment it gets broke, it is then "Toxic Waste".
CRT glass is coated with lead and very few "glass companies" are even taking it now. The company mentioned above, " Dlubak" is one of a few that will process this type of glass.
They will charge you to take the tubes from you, plus you also pay for freight.
Unless you are getting into E-Waste
recycling in a big way, I would back off from it, as more and more States are passing Legislation concerning E-Waste.
This is a "Good Time" to get into it, BUT, be advised that each state has different laws concerning it and it is a very specialized market, so if you are just doing a few here and there, well, there are a lot of things that you can make a LOT more money on.
Good Luck !!