We carry many, many back issues of science fiction digests and magazines.
Here's a listing of the titles; please inquire about specific issues.

DIGESTS
Astounding Science Fiction, Analog, Amazing Stories, Isaac Asimov's Science Fiction Magazine, Beyond, Famous Science Fiction, Fantastic Universe, Fantastic, Fantasy & Science Fiction, Forgotten Fantasy, Future, Galaxy, Galaxy Science Fiction Novels, Great Science Fiction, If, Imagination, Imaginative Tales, Infinity, International Science Fiction, New Worlds, Original Science Fiction, Orbit, Other Worlds, Rocket Stories, Satellite, Science Fantasy, Science Fiction Adventures, Science Fiction Stories, Science Fiction Studies, Space Adventures, Space Science Fiction, Spaceway, Suspense, Thrilling Science Fiction, Tomorrow, Universe, Venture, Vortex, Worlds Beyond, Worlds of Fantasy, Worlds of Tomorrow

MAGAZINES
Absolute Magnitude, Cosmos, Foundation, Future Life, Galileo, Interzone, Locus, Low Orbit, Pandora, The Patchin Review, Questar, Quantum, Science Action Chronicle, Star Encounters, Strange Plasma, Vertex