Do you have something you love collecting but can’t find more of what you’re looking for in your immediate area? This problem tends to happen once you really start getting into collecting something. Once you've reached this level of interest, the next step is to seek out conventions.
Whatever you collect, there’s probably a convention for it that meets annually. Just do some searching online to find a convention or trade show that meets your fancy. If you have the means to attend such a show, you’ll inevitably expand your collection and meet like-minded people.