I've been a member for about 10 years.
Joined initially because some of the guys that sold things in the Classifieds were members and we became friends after a few transactions.
They were so helpful and knowledgeable to a guy building a "collection" of revolvers, grips & boxes with limited knowledge of the subjects.
That was the beginning but after that the Journal, SWCA members forum and the occasional symposium is why I stay. AND I still learn from these guys!
You don't have to have a lot of S&W's and you don't have to have a lot of money to fit in.
I didn't when I joined (still don't) but have built a small collection of nice guns with the knowledge I've gained.
If you do join (and I hope you do) ask questions and participate in threads on what your interested in.
It's a opportunity to be part of the history of S&W that is not available anywhere else.