I'm talking about comics you paid a premium for; not new issues.
Way back when, in the 1980's I bought a copy of Daredevil #158 when everything was basically sold as VF/NM for, I believe, $36.00 when that issue was just heating up.
Got it slabbed long ago as a 6.0. After being slabbed it's worth about $30.00 for this grade.
I have so many like that, classic Neal Adams Batman stuff, and because of the grade and because no one cares about "the death of Alfred" they're worth about the same when I bought them 30-40 years ago.
Of course, there's plenty I bought that did go up.
Y'all?