Looking at the comics that came out dated August 1981, I was clearly still just beginning to check out the comic book stores for stuff that caught my eye. While there are a number of comics here that I would end up buying as back issues, I believe there was only one that I bought as new off the stands.
Star Wars #50 caught my eye for a couple of reason, if memory serves. It had a nice painted cover by Tom Palmer, and it was an extra-sized anniversary issue. Today, I don't remember much about the story, although I see that it was by Archie Goodwin, Al Williamson, and Tom Palmer, so it was probably good. I don't recall picking up issue 51, so I suspect it was fairly self-contained.
It's funny; I was a huge Star Wars fan as a kid, but I never bought the Marvel comics on a regular basis until years later, when I became a comics fan. I remember reading the comics adaptations of the movies, but I rarely bought any of the issues set in between. You'd think I'd have a serious hunger for that stuff. I can't really explain why, except that I wasn't buying any comic on a regular basis at that point. I just hadn't gotten into that habit yet.