Cat converter

What is your question?

I need to know about my cat converter, and does it have high value if sold or scrapped? Is it possible to have it stolen,welded straight piped back with a protective looking case or cover that makes it appear to still be in place if u look???

What makes this problem better or worse?

Power loss, rattling all over, engine light blinking

How long has your 1998 Saturn SL2 had this problem?

About a month or two