No LCS's in my hometown, but I would often nag my folks to take me to a shop in Stockton, CA on Pacific Avenue (before Al's Comics). They closed after a year or so and I picked up books across the street at a place called Avenue Books. Mitch M. opened a shop not too far away from Pacific Avenue in either 79 or 80. I bought several high grade spidey's from him (39,43, 52 and a few others) along with a sweet FF Annual 2. I distinctly remember he had a low grade AF15 in a big glass case. Being a high grade snob, I didn't even consider it at the time. I think he had it priced at $450.00.
It was always a treat to visit Comics and Comix on k street in Sacramento. Saw my first Strange Tales 110 along with JIM83, Avengers 1, etal.
My favorite shop during the late 70's/early 80's was Atlantis Fantasyworld in Santa Cruz. They had a huge building downtown chock full of GA, SA and BA books. I picked up my X-men 1, GS X-men 1, 94-121 and countless other books from them.
I have fond memories of all of these places.