Learning to Have Fun with Vintage Cameras is a process for most camera buffs.  From what I've learned, it seems to me that we can be divided into two main groups.  These are the people who want to shoot pictures with the old cameras.  They are Photographers who like to use old cameras, and the Collectors who display collections of them.

Because vintage camera includes so many of the items that appear on eBay, each of the two groups have to focus their activities down to a manageable scope.  for instance a collector can special in aa single manufacturer, or a particular time frame for the cameras they collect.  A photographer can concentrate on particular subjects, like landscapes or portraits, or architecture or sports.

It's important to decide what path you want to follow, as soon as you discover the stuff you are buying on eBay has filled up a room in your house, and you have to rent a storage locker to hold your new additions. This is evidence of a growing addiction, and if you don't put some limits on it it will take over your life.