at 45, you would be doing yourself a disservice. i sold mine for about 100 shipped, which was also a disservice to myself.
keep it, or try and get some decent money for it, like 200.
it has "precious metals" i believe, so try googling a local spot that cares about that.
new from mazda, the dp cat is around 900 bucks. and the second cat, mp, is around 600.