Let me tell you about dogs. I worked for the Michigan Bell Telephone (now AT&T) for 37 years and the line I heard the most was "My dog don't bite" and the line I heard second most was "Why that's the first time he ever did that!"
Unless you have a temperature controlled building or live out west where the temps don't change much (definitely not Michigan) bikes deteriorate fast just sitting. I no longer want to change gaskets to stop leaks on bikes I no longer ride. None of them are "show" bikes they are all a little rusty here and dented there. They were ridden. Most of the parts I had have been unloaded, I mostly went to swap meets for the fun of it and if I found good deals I bought them. But now with all the aftermarket stuff, it's easier to just buy new. There was a time it was cool to say, "well I got a couple of FLHs and a FXE and blah blah", but now multiple bikes it's like trying to keep a few girlfriends, you just can't keep everybody running smoothly all the time!