I never really sold any of my original Marvel runs, but I traded them all for Gooooooolllllllldddddd! in the 80's and early 90's.
I weirdly still have like a box of Warlock appearances (I collected all his appearances, whether I collected the series he appeared in or not), some Neal Adams Marvels, Barry Smith Marvels, odds and ends.
Nothing significant, just books that never got traded.
I randomly have a bunch of silver age DC from those days, that were never in my collection, but also never got traded (Brave and Bold 28, JLA 1, Showcases, Mystery in Spaces, etc.).
I also bought some collections in the last 8 or 9 years, so I have a lot of the Marvel runs I traded away again (but I don't consider any of those books in my current collection).