Great and I think under-rated series. Later issues feature very early Avengers reprints with Jack Kirby artwork. Reprints lots of Jack Kirby artwork from the early Marvel Silver Age.
These Miller titles brought much American material to the UK that would not have been seen otherwise. Spellbounds are usefully dated by copyright year (no month) so it helps place them in historical context.
This title really starts getting interesting and collectible from issue #33 with a reprint cover and story of Tales to Astonish #16. Some classic Jack Kiby art 'monster' stories follow....
The title really gets going with theearly Silver Age Marvel super-hero reprints like #41 and the 1st Ant-Man in costume from Tales to Astonish #35 and #43 reprinting the 2nd appearance of Iron Man from tales of Suspense #40.
Note: some PR issues may have no value. Selected issues in FN, VF or VF/NM may not exist in some titles.