If you want to make it worth a bunch less, you shouldn't do anything that involves permanently altering it. Springs, barrel, etc. that can be refitted and replaced are okay, but keep the original stuff to put back on if you need it.
Yeah. That’s what I was thinking. Thanks, guys.
Oh - did I mention he had (now I have) a .22 conversion slide?
It’s a pain to change out, so I usually just shoot .45’s