Marvel Classics Comics were never on the must-buy list, more seen generally as not being ' real ' Marvel, in much the same way that their movie adaptations were.
Marvel had spent so long building up a cohesive universe for their costumed cut-ups to cavort around in, that anything outside of that world was seen, by us anyway, as inferior goods.
I just remember being bemused by Marvel Classics Comics, like ' Why are they doing that? ' although having said that, I read and re-read the Tom Sawyer one till the cover fell off. Plus they were a bit thicker than the average comic, so that felt a bit special, and of course Gil Kane did most of the covers so you could at least pretend that what you were buying was the real thing.
Anyway, I was of course a dumb kid, and there's some real gems in this series. Like this one, The Time Machine adapted by Otto Binder and Alex Nino.
It's not entirely successful, with Binder talking down to the kids quite a bit, and Nino being forced to reign in his natural insanity so as not to scare the children ( or more likely, the parents )
But the 1960 film by George Pal is something me and my dad will watch every time it's on, so any version of this story is always welcome.