CAT disposal

I sold my 2004 E46 318ti early last year. 1 year before I sold it, I fitted a Power Flow exhaust and de-CAT the system. I still have the stainless resonator, muffler and CAT. I removed the components at around 90k. All of which were very well preserved in my garage.

What do I do with the components? Do I dump them at a scrapyard or is there perhaps a 2nd hand market somewhere? I believe there is some value in the CAT (platinum traces) considering is has only done 90k and a new CAT is ridiculously expensive.

If the best thing to do is to take it to a scrapyard, where will I get the most for the CAT?

Thanks in advance for your comments