Has anyone ever dealt with platinum sensors (PT100/PT1000/etc) or Thermocouple wires?

Is it possible to get platinum from the sensors to sell or thermocouple wires? If so, how do you do it?

I know that platinum sells for a very high price, so I wasn't sure if this was possible, or if this is even the same type of platinum (I assume it is)...

I have access to 100's of these - usually faulty sensors that are replaced.

I'm not sure how to proceed or if I should pass.

What do you think, waste of time - or a gold (or platinum) mine?