I think the Minolta SRT's were underrated back in the day. I had a newspaper photographer friend who wouldn't use anything else ("Just as good as a Nikon but much cheaper" he kept telling me.). My experiences with them have been pretty good. Sticky lens apertures are common these days with the Minolta lenses, I suspect because many of them got so little use. You could buy them at Kmart or Sears, so Minolta sold a ton of them that likely got little use.
Great cameras, though. I still have an SRT201 here, and even though I shot Nikons back then, I always wanted an XK but never got around to it. Enjoy your cameras!